20513780204 has 24 divisors (see below), whose sum is σ = 37213963920. Its totient is φ = 9886401216.

The previous prime is 20513780197. The next prime is 20513780207. The reversal of 20513780204 is 40208731502.

It is not an unprimeable number, because it can be changed into a prime (20513780207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631859 + ... + 663530.

It is an arithmetic number, because the mean of its divisors is an integer number (1550581830).

Almost surely, 2^20513780204 is an apocalyptic number.

It is an amenable number.

20513780204 is a deficient number, since it is larger than the sum of its proper divisors (16700183716).

20513780204 is a wasteful number, since it uses less digits than its factorization.

20513780204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295537 (or 1295535 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 20513780204 in words is "twenty billion, five hundred thirteen million, seven hundred eighty thousand, two hundred four".