20472798 has 8 divisors (see below), whose sum is σ = 40945608. Its totient is φ = 6824264.

The previous prime is 20472797. The next prime is 20472821. The reversal of 20472798 is 89727402.

It is a sphenic number, since it is the product of 3 distinct primes.

20472798 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706061 + ... + 1706072.

It is an arithmetic number, because the mean of its divisors is an integer number (5118201).

Almost surely, 2^20472798 is an apocalyptic number.

20472798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20472798 is a wasteful number, since it uses less digits than its factorization.

20472798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412138.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 20472798 is about 4524.6876135265. The cubic root of 20472798 is about 273.5640767531.

The spelling of 20472798 in words is "twenty million, four hundred seventy-two thousand, seven hundred ninety-eight".