20078472 has 32 divisors (see below), whose sum is σ = 50402880. Its totient is φ = 6665280.

The previous prime is 20078453. The next prime is 20078507. The reversal of 20078472 is 27487002.

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, 4722 + ... + 7902.

It is an arithmetic number, because the mean of its divisors is an integer number (1575090).

Almost surely, 2^20078472 is an apocalyptic number.

It is an amenable number.

20078472 is an abundant number, since it is smaller than the sum of its proper divisors (30324408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20078472 is a wasteful number, since it uses less digits than its factorization.

20078472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453 (or 3449 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20078472 is about 4480.9008022941. The cubic root of 20078472 is about 271.7963079957.

The spelling of 20078472 in words is "twenty million, seventy-eight thousand, four hundred seventy-two".