21162952 has 16 divisors (see below), whose sum is σ = 39945600. Its totient is φ = 10510800.

The previous prime is 21162949. The next prime is 21162959. The reversal of 21162952 is 25926112.

It is a self number, because there is not a number n which added to its sum of digits gives 21162952.

It is not an unprimeable number, because it can be changed into a prime (21162959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7552 + ... + 9967.

It is an arithmetic number, because the mean of its divisors is an integer number (2496600).

Almost surely, 2^21162952 is an apocalyptic number.

It is an amenable number.

21162952 is a deficient number, since it is larger than the sum of its proper divisors (18782648).

21162952 is a wasteful number, since it uses less digits than its factorization.

21162952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676 (or 17672 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 21162952 is about 4600.3208583750. The cubic root of 21162952 is about 276.6041864684.

The spelling of 21162952 in words is "twenty-one million, one hundred sixty-two thousand, nine hundred fifty-two".