20146993904 has 20 divisors (see below), whose sum is σ = 39037292376. Its totient is φ = 10072853952.

The previous prime is 20146993903. The next prime is 20146993931. The reversal of 20146993904 is 40939964102.

It is a super-2 number, since 2×20146993904² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146993903) 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, 311642 + ... + 370694.

Almost surely, 2^20146993904 is an apocalyptic number.

It is an amenable number.

20146993904 is a deficient number, since it is larger than the sum of its proper divisors (18890298472).

20146993904 is a wasteful number, since it uses less digits than its factorization.

20146993904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80384 (or 80378 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 20146993904 in words is "twenty billion, one hundred forty-six million, nine hundred ninety-three thousand, nine hundred four".