21514800 has 60 divisors (see below), whose sum is σ = 68922920. Its totient is φ = 5736960.

The previous prime is 21514789. The next prime is 21514807. The reversal of 21514800 is 841512.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (21514807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7765 + ... + 10164.

Almost surely, 2^21514800 is an apocalyptic number.

21514800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21514800 is an abundant number, since it is smaller than the sum of its proper divisors (47408120).

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

21514800 is a wasteful number, since it uses less digits than its factorization.

21514800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17950 (or 17939 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 21514800 is about 4638.4048982382. The cubic root of 21514800 is about 278.1286777277.

The spelling of 21514800 in words is "twenty-one million, five hundred fourteen thousand, eight hundred".