21472950 has 96 divisors (see below), whose sum is σ = 56487456. Its totient is φ = 5391360.

The previous prime is 21472949. The next prime is 21472951. The reversal of 21472950 is 5927412.

21472950 = 305² + 306² + ... + 452².

It is an interprime number because it is at equal distance from previous prime (21472949) and next prime (21472951).

It is a super-2 number, since 2×21472950² = 922175163405000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294114 + ... + 294186.

It is an arithmetic number, because the mean of its divisors is an integer number (588411).

Almost surely, 2^21472950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21472950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28243728).

21472950 is an abundant number, since it is smaller than the sum of its proper divisors (35014506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21472950 is a wasteful number, since it uses less digits than its factorization.

21472950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 21472950 is about 4633.8914531957. The cubic root of 21472950 is about 277.9482245762.

It can be divided in two parts, 21472 and 950, that added together give a palindrome (22422).

The spelling of 21472950 in words is "twenty-one million, four hundred seventy-two thousand, nine hundred fifty".