20078764 has 24 divisors (see below), whose sum is σ = 36324288. Its totient is φ = 9705360.

The previous prime is 20078749. The next prime is 20078771. The reversal of 20078764 is 46787002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17859 + ... + 18949.

It is an arithmetic number, because the mean of its divisors is an integer number (1513512).

Almost surely, 2^20078764 is an apocalyptic number.

It is an amenable number.

20078764 is a deficient number, since it is larger than the sum of its proper divisors (16245524).

20078764 is a wasteful number, since it uses less digits than its factorization.

20078764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20078764 is about 4480.9333849099. The cubic root of 20078764 is about 271.7976255617.

The spelling of 20078764 in words is "twenty million, seventy-eight thousand, seven hundred sixty-four".