20475747442 has 64 divisors (see below), whose sum is σ = 33904051200. Its totient is φ = 9263548800.

The previous prime is 20475747419. The next prime is 20475747469. The reversal of 20475747442 is 24474757402.

It is a junction number, because it is equal to n+sod(n) for n = 20475747392 and 20475747401.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37847692 + ... + 37848232.

It is an arithmetic number, because the mean of its divisors is an integer number (529750800).

Almost surely, 2^20475747442 is an apocalyptic number.

20475747442 is a deficient number, since it is larger than the sum of its proper divisors (13428303758).

20475747442 is an equidigital number, since it uses as much as digits as its factorization.

20475747442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 46.

The spelling of 20475747442 in words is "twenty billion, four hundred seventy-five million, seven hundred forty-seven thousand, four hundred forty-two".