20078372 has 6 divisors (see below), whose sum is σ = 35137158. Its totient is φ = 10039184.

The previous prime is 20078371. The next prime is 20078393. The reversal of 20078372 is 27387002.

It can be written as a sum of positive squares in only one way, i.e., 13957696 + 6120676 = 3736^2 + 2474^2 .

It is not an unprimeable number, because it can be changed into a prime (20078371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2509793 + ... + 2509800.

It is an arithmetic number, because the mean of its divisors is an integer number (5856193).

Almost surely, 2^20078372 is an apocalyptic number.

It is an amenable number.

20078372 is a deficient number, since it is larger than the sum of its proper divisors (15058786).

20078372 is a wasteful number, since it uses less digits than its factorization.

20078372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019597 (or 5019595 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20078372 is about 4480.8896438096. The cubic root of 20078372 is about 271.7958567715.

The spelling of 20078372 in words is "twenty million, seventy-eight thousand, three hundred seventy-two".