20192745465639 has 24 divisors (see below), whose sum is σ = 29210268488544. Its totient is φ = 13442000040000.

The previous prime is 20192745465611. The next prime is 20192745465677. The reversal of 20192745465639 is 93656454729102.

It is a happy number.

20192745465639 is a `hidden beast` number, since 2 + 0 + 1 + 9 + 2 + 7 + 4 + 546 + 56 + 39 = 666.

It is not a de Polignac number, because 20192745465639 - 2¹⁹ = 20192744941351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20192745465689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163852534 + ... + 163975724.

It is an arithmetic number, because the mean of its divisors is an integer number (1217094520356).

Almost surely, 2^{20192745465639} is an apocalyptic number.

20192745465639 is a deficient number, since it is larger than the sum of its proper divisors (9017523022905).

20192745465639 is a wasteful number, since it uses less digits than its factorization.

20192745465639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149879 (or 149876 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 63.

The spelling of 20192745465639 in words is "twenty trillion, one hundred ninety-two billion, seven hundred forty-five million, four hundred sixty-five thousand, six hundred thirty-nine".