21372802 has 8 divisors (see below), whose sum is σ = 34973712. Its totient is φ = 9714900.

The previous prime is 21372787. The next prime is 21372811. The reversal of 21372802 is 20827312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485724 + ... + 485767.

It is an arithmetic number, because the mean of its divisors is an integer number (4371714).

Almost surely, 2^21372802 is an apocalyptic number.

21372802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21372802 is a deficient number, since it is larger than the sum of its proper divisors (13600910).

21372802 is a wasteful number, since it uses less digits than its factorization.

21372802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971504.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 21372802 is about 4623.0727876597. The cubic root of 21372802 is about 277.5154421512.

Subtracting from 21372802 its reverse (20827312), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 21372802 in words is "twenty-one million, three hundred seventy-two thousand, eight hundred two".