20077015647 has 16 divisors (see below), whose sum is σ = 28848057728. Its totient is φ = 12346719840.

The previous prime is 20077015639. The next prime is 20077015649. The reversal of 20077015647 is 74651077002.

It is not a de Polignac number, because 20077015647 - 2³ = 20077015639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077015649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115729 + ... + 231402.

It is an arithmetic number, because the mean of its divisors is an integer number (1803003608).

Almost surely, 2^20077015647 is an apocalyptic number.

20077015647 is a deficient number, since it is larger than the sum of its proper divisors (8771042081).

20077015647 is a wasteful number, since it uses less digits than its factorization.

20077015647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348630.

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 20077015647 in words is "twenty billion, seventy-seven million, fifteen thousand, six hundred forty-seven".