20476431 has 12 divisors (see below), whose sum is σ = 29794752. Its totient is φ = 13550496.

The previous prime is 20476397. The next prime is 20476441. The reversal of 20476431 is 13467402.

It is not a de Polignac number, because 20476431 - 2⁶ = 20476367 is a prime.

It is a super-3 number, since 3×20476431³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20476395 and 20476404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20476441) 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, 7071 + ... + 9536.

It is an arithmetic number, because the mean of its divisors is an integer number (2482896).

Almost surely, 2^20476431 is an apocalyptic number.

20476431 is a deficient number, since it is larger than the sum of its proper divisors (9318321).

20476431 is a wasteful number, since it uses less digits than its factorization.

20476431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16750 (or 16747 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20476431 is about 4525.0890598971. The cubic root of 20476431 is about 273.5802575654.

The spelling of 20476431 in words is "twenty million, four hundred seventy-six thousand, four hundred thirty-one".