20780808742715 has 32 divisors (see below), whose sum is σ = 28622845480320. Its totient is φ = 14187976971264.

The previous prime is 20780808742699. The next prime is 20780808742741. The reversal of 20780808742715 is 51724780808702.

It is a cyclic number.

It is not a de Polignac number, because 20780808742715 - 2⁴ = 20780808742699 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390084101 + ... + 390137369.

It is an arithmetic number, because the mean of its divisors is an integer number (894463921260).

Almost surely, 2^{20780808742715} is an apocalyptic number.

20780808742715 is a deficient number, since it is larger than the sum of its proper divisors (7842036737605).

20780808742715 is a wasteful number, since it uses less digits than its factorization.

20780808742715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101351.

The product of its (nonzero) digits is 14049280, while the sum is 59.

The spelling of 20780808742715 in words is "twenty trillion, seven hundred eighty billion, eight hundred eight million, seven hundred forty-two thousand, seven hundred fifteen".