20615120678 has 16 divisors (see below), whose sum is σ = 31637781600. Its totient is φ = 10071432000.

The previous prime is 20615120671. The next prime is 20615120681. The reversal of 20615120678 is 87602151602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615120671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541103 + ... + 577946.

It is an arithmetic number, because the mean of its divisors is an integer number (1977361350).

Almost surely, 2^20615120678 is an apocalyptic number.

20615120678 is a deficient number, since it is larger than the sum of its proper divisors (11022660922).

20615120678 is a wasteful number, since it uses less digits than its factorization.

20615120678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119263.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 20615120678 in words is "twenty billion, six hundred fifteen million, one hundred twenty thousand, six hundred seventy-eight".