20365253678 has 24 divisors (see below), whose sum is σ = 38765772504. Its totient is φ = 7934514000.

The previous prime is 20365253647. The next prime is 20365253681. The reversal of 20365253678 is 87635256302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9444773 + ... + 9446928.

It is an arithmetic number, because the mean of its divisors is an integer number (1615240521).

Almost surely, 2^20365253678 is an apocalyptic number.

20365253678 is a deficient number, since it is larger than the sum of its proper divisors (18400518826).

20365253678 is a wasteful number, since it uses less digits than its factorization.

20365253678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18891728 (or 18891721 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 20365253678 in words is "twenty billion, three hundred sixty-five million, two hundred fifty-three thousand, six hundred seventy-eight".