21629152 has 24 divisors (see below), whose sum is σ = 42839496. Its totient is φ = 10749312.

The previous prime is 21629143. The next prime is 21629161. The reversal of 21629152 is 25192612.

It is an interprime number because it is at equal distance from previous prime (21629143) and next prime (21629161).

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 21629152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3583 + ... + 7489.

It is an arithmetic number, because the mean of its divisors is an integer number (1784979).

Almost surely, 2^21629152 is an apocalyptic number.

It is an amenable number.

21629152 is a deficient number, since it is larger than the sum of its proper divisors (21210344).

21629152 is a wasteful number, since it uses less digits than its factorization.

21629152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090 (or 4082 counting only the distinct ones).

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

The square root of 21629152 is about 4650.7152138139. The cubic root of 21629152 is about 278.6205622110.

The spelling of 21629152 in words is "twenty-one million, six hundred twenty-nine thousand, one hundred fifty-two".