20292472 has 8 divisors (see below), whose sum is σ = 38048400. Its totient is φ = 10146232.

The previous prime is 20292469. The next prime is 20292473. The reversal of 20292472 is 27429202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20292472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20292473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268272 + ... + 1268287.

It is an arithmetic number, because the mean of its divisors is an integer number (4756050).

Almost surely, 2^20292472 is an apocalyptic number.

It is an amenable number.

20292472 is a deficient number, since it is larger than the sum of its proper divisors (17755928).

20292472 is a wasteful number, since it uses less digits than its factorization.

20292472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536565 (or 2536561 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20292472 is about 4504.7166392571. The cubic root of 20292472 is about 272.7585157204.

The spelling of 20292472 in words is "twenty million, two hundred ninety-two thousand, four hundred seventy-two".