21063492 has 36 divisors (see below), whose sum is σ = 55560960. Its totient is φ = 6715632.

The previous prime is 21063481. The next prime is 21063503. The reversal of 21063492 is 29436012.

21063492 is a `hidden beast` number, since 21 + 0 + 634 + 9 + 2 = 666.

21063492 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (21063481) and next prime (21063503).

It is a tau number, because it is divible by the number of its divisors (36).

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, 11892 + ... + 13547.

It is an arithmetic number, because the mean of its divisors is an integer number (1543360).

Almost surely, 2^21063492 is an apocalyptic number.

It is an amenable number.

21063492 is an abundant number, since it is smaller than the sum of its proper divisors (34497468).

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

21063492 is a wasteful number, since it uses less digits than its factorization.

21063492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25472 (or 25467 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 21063492 is about 4589.4980117656. The cubic root of 21063492 is about 276.1701848955.

The spelling of 21063492 in words is "twenty-one million, sixty-three thousand, four hundred ninety-two".