21352902 has 16 divisors (see below), whose sum is σ = 43014720. Its totient is φ = 7066152.

The previous prime is 21352883. The next prime is 21352907. The reversal of 21352902 is 20925312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352907) 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, 11968 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (2688420).

Almost surely, 2^21352902 is an apocalyptic number.

21352902 is an abundant number, since it is smaller than the sum of its proper divisors (21661818).

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

21352902 is a wasteful number, since it uses less digits than its factorization.

21352902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25747.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 21352902 is about 4620.9200382608. The cubic root of 21352902 is about 277.4292847975.

The spelling of 21352902 in words is "twenty-one million, three hundred fifty-two thousand, nine hundred two".