20477641504 has 24 divisors (see below), whose sum is σ = 40320067788. Its totient is φ = 10237624320.

The previous prime is 20477641493. The next prime is 20477641507. The reversal of 20477641504 is 40514677402.

It can be written as a sum of positive squares in 2 ways, for example, as 17758227600 + 2719413904 = 133260^2 + 52148^2 .

It is not an unprimeable number, because it can be changed into a prime (20477641507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282964 + ... + 347884.

Almost surely, 2^20477641504 is an apocalyptic number.

It is an amenable number.

20477641504 is a deficient number, since it is larger than the sum of its proper divisors (19842426284).

20477641504 is an equidigital number, since it uses as much as digits as its factorization.

20477641504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74788 (or 74780 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 20477641504 in words is "twenty billion, four hundred seventy-seven million, six hundred forty-one thousand, five hundred four".