20520115768695 has 128 divisors (see below), whose sum is σ = 35743757303808. Its totient is φ = 10022256921600.

The previous prime is 20520115768693. The next prime is 20520115768699. The reversal of 20520115768695 is 59686751102502.

It is not a de Polignac number, because 20520115768695 - 2¹ = 20520115768693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520115768693) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 870849984 + ... + 870873546.

It is an arithmetic number, because the mean of its divisors is an integer number (279248103936).

Almost surely, 2^{20520115768695} is an apocalyptic number.

20520115768695 is a deficient number, since it is larger than the sum of its proper divisors (15223641535113).

20520115768695 is a wasteful number, since it uses less digits than its factorization.

20520115768695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24493.

The product of its (nonzero) digits is 9072000, while the sum is 57.

The spelling of 20520115768695 in words is "twenty trillion, five hundred twenty billion, one hundred fifteen million, seven hundred sixty-eight thousand, six hundred ninety-five".