21946950 has 60 divisors (see below), whose sum is σ = 60991260. Its totient is φ = 5851440.

The previous prime is 21946937. The next prime is 21946963. The reversal of 21946950 is 5964912.

It is an interprime number because it is at equal distance from previous prime (21946937) and next prime (21946963).

It is a super-2 number, since 2×21946950² = 963337228605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1341 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (1016521).

Almost surely, 2^21946950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21946950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30495630).

21946950 is an abundant number, since it is smaller than the sum of its proper divisors (39044310).

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

21946950 is a wasteful number, since it uses less digits than its factorization.

21946950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 21946950 is about 4684.7571975504. The cubic root of 21946950 is about 279.9785272649.

The spelling of 21946950 in words is "twenty-one million, nine hundred forty-six thousand, nine hundred fifty".