21370926 has 16 divisors (see below), whose sum is σ = 42822864. Its totient is φ = 7110144.

The previous prime is 21370913. The next prime is 21370927. The reversal of 21370926 is 62907312.

It is a junction number, because it is equal to n+sod(n) for n = 21370893 and 21370902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376 + ... + 6548.

It is an arithmetic number, because the mean of its divisors is an integer number (2676429).

Almost surely, 2^21370926 is an apocalyptic number.

21370926 is an abundant number, since it is smaller than the sum of its proper divisors (21451938).

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

21370926 is a wasteful number, since it uses less digits than its factorization.

21370926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 21370926 is about 4622.8698878511. The cubic root of 21370926 is about 277.5073222644.

The spelling of 21370926 in words is "twenty-one million, three hundred seventy thousand, nine hundred twenty-six".