20943475 has 12 divisors (see below), whose sum is σ = 29680144. Its totient is φ = 14361120.

The previous prime is 20943469. The next prime is 20943493. The reversal of 20943475 is 57434902.

It is not a de Polignac number, because 20943475 - 2³ = 20943467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20943475.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59664 + ... + 60013.

Almost surely, 2^20943475 is an apocalyptic number.

20943475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20943475 is a deficient number, since it is larger than the sum of its proper divisors (8736669).

20943475 is a wasteful number, since it uses less digits than its factorization.

20943475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119694 (or 119689 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20943475 is about 4576.4041561033. The cubic root of 20943475 is about 275.6446584018.

The spelling of 20943475 in words is "twenty million, nine hundred forty-three thousand, four hundred seventy-five".