20747506476 has 48 divisors (see below), whose sum is σ = 49878549504. Its totient is φ = 6708769536.

The previous prime is 20747506447. The next prime is 20747506547. The reversal of 20747506476 is 67460574702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99040 + ... + 226503.

It is an arithmetic number, because the mean of its divisors is an integer number (1039136448).

Almost surely, 2^20747506476 is an apocalyptic number.

It is an amenable number.

20747506476 is an abundant number, since it is smaller than the sum of its proper divisors (29131043028).

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

20747506476 is a wasteful number, since it uses less digits than its factorization.

20747506476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325710 (or 325708 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 48.

The spelling of 20747506476 in words is "twenty billion, seven hundred forty-seven million, five hundred six thousand, four hundred seventy-six".