20747878130575 has 12 divisors (see below), whose sum is σ = 25727986091448. Its totient is φ = 16597904304800.

The previous prime is 20747878130563. The next prime is 20747878130611. The reversal of 20747878130575 is 57503187874702.

It is a happy number.

It is not a de Polignac number, because 20747878130575 - 2³⁷ = 20610439177103 is a prime.

It is a Duffinian number.

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, 8889832 + ... + 10978381.

It is an arithmetic number, because the mean of its divisors is an integer number (2143998840954).

Almost surely, 2^{20747878130575} is an apocalyptic number.

20747878130575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20747878130575 is a deficient number, since it is larger than the sum of its proper divisors (4980107960873).

20747878130575 is a wasteful number, since it uses less digits than its factorization.

20747878130575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19909994 (or 19909989 counting only the distinct ones).

The product of its (nonzero) digits is 92198400, while the sum is 64.

The spelling of 20747878130575 in words is "twenty trillion, seven hundred forty-seven billion, eight hundred seventy-eight million, one hundred thirty thousand, five hundred seventy-five".