21350902 has 16 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 10228288.

The previous prime is 21350899. The next prime is 21350921. The reversal of 21350902 is 20905312.

It is a super-2 number, since 2×21350902² = 911722032427208, 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 7 ways as a sum of consecutive naturals, for example, 6603 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^21350902 is an apocalyptic number.

21350902 is a deficient number, since it is larger than the sum of its proper divisors (12034058).

21350902 is a wasteful number, since it uses less digits than its factorization.

21350902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 21350902 is about 4620.7036260725. The cubic root of 21350902 is about 277.4206228072.

It can be divided in two parts, 213 and 50902, that added together give a palindrome (51115).

The spelling of 21350902 in words is "twenty-one million, three hundred fifty thousand, nine hundred two".