21472902 has 36 divisors (see below), whose sum is σ = 51143820. Its totient is φ = 6506280.

The previous prime is 21472901. The next prime is 21472931. The reversal of 21472902 is 20927412.

It is a super-2 number, since 2×21472902² = 922171040603208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472901) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2752 + ... + 7107.

Almost surely, 2^21472902 is an apocalyptic number.

21472902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21472902 is an abundant number, since it is smaller than the sum of its proper divisors (29670918).

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

21472902 is a wasteful number, since it uses less digits than its factorization.

21472902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889 (or 9875 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21472902 is about 4633.8862739606. The cubic root of 21472902 is about 277.9480174703.

Subtracting from 21472902 its reverse (20927412), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 21472902 in words is "twenty-one million, four hundred seventy-two thousand, nine hundred two".