21514128 has 40 divisors (see below), whose sum is σ = 55749408. Its totient is φ = 7149312.

The previous prime is 21514123. The next prime is 21514153. The reversal of 21514128 is 82141512.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21514098 and 21514107.

It is not an unprimeable number, because it can be changed into a prime (21514123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24676 + ... + 25532.

Almost surely, 2^21514128 is an apocalyptic number.

It is an amenable number.

21514128 is an abundant number, since it is smaller than the sum of its proper divisors (34235280).

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

21514128 is a wasteful number, since it uses less digits than its factorization.

21514128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 1385 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 21514128 is about 4638.3324589770. The cubic root of 21514128 is about 278.1257819782.

The spelling of 21514128 in words is "twenty-one million, five hundred fourteen thousand, one hundred twenty-eight".