21532792 has 8 divisors (see below), whose sum is σ = 40374000. Its totient is φ = 10766392.

The previous prime is 21532783. The next prime is 21532799. The reversal of 21532792 is 29723512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21532792² = 927322262630528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345792 + ... + 1345807.

It is an arithmetic number, because the mean of its divisors is an integer number (5046750).

Almost surely, 2^21532792 is an apocalyptic number.

It is an amenable number.

21532792 is a deficient number, since it is larger than the sum of its proper divisors (18841208).

21532792 is a wasteful number, since it uses less digits than its factorization.

21532792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691605 (or 2691601 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 21532792 is about 4640.3439527690. The cubic root of 21532792 is about 278.2061855659.

The spelling of 21532792 in words is "twenty-one million, five hundred thirty-two thousand, seven hundred ninety-two".