20485790194 has 32 divisors (see below), whose sum is σ = 32713414272. Its totient is φ = 9588000000.

The previous prime is 20485790191. The next prime is 20485790209. The reversal of 20485790194 is 49109758402.

It is not an unprimeable number, because it can be changed into a prime (20485790191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8029219 + ... + 8031769.

It is an arithmetic number, because the mean of its divisors is an integer number (1022294196).

Almost surely, 2^20485790194 is an apocalyptic number.

20485790194 is a deficient number, since it is larger than the sum of its proper divisors (12227624078).

20485790194 is a wasteful number, since it uses less digits than its factorization.

20485790194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 20485790194 in words is "twenty billion, four hundred eighty-five million, seven hundred ninety thousand, one hundred ninety-four".