21430050 has 24 divisors (see below), whose sum is σ = 53146896. Its totient is φ = 5714640.

The previous prime is 21430037. The next prime is 21430063. The reversal of 21430050 is 5003412.

It is an interprime number because it is at equal distance from previous prime (21430037) and next prime (21430063).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71284 + ... + 71583.

It is an arithmetic number, because the mean of its divisors is an integer number (2214454).

Almost surely, 2^21430050 is an apocalyptic number.

21430050 is an abundant number, since it is smaller than the sum of its proper divisors (31716846).

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

21430050 is a wasteful number, since it uses less digits than its factorization.

21430050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142882 (or 142877 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 21430050 is about 4629.2602000752. The cubic root of 21430050 is about 277.7630003991.

Adding to 21430050 its reverse (5003412), we get a palindrome (26433462).

The spelling of 21430050 in words is "twenty-one million, four hundred thirty thousand, fifty".