20139723461028 has 48 divisors (see below), whose sum is σ = 47650180919040. Its totient is φ = 6619724669184.

The previous prime is 20139723461009. The next prime is 20139723461059. The reversal of 20139723461028 is 82016432793102.

It is a super-3 number, since 3×20139723461028³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25299351 + ... + 26083262.

It is an arithmetic number, because the mean of its divisors is an integer number (992712102480).

Almost surely, 2^{20139723461028} is an apocalyptic number.

It is an amenable number.

20139723461028 is an abundant number, since it is smaller than the sum of its proper divisors (27510457458012).

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

20139723461028 is a wasteful number, since it uses less digits than its factorization.

20139723461028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51383076 (or 51383074 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20139723461028 in words is "twenty trillion, one hundred thirty-nine billion, seven hundred twenty-three million, four hundred sixty-one thousand, twenty-eight".