20463872 has 108 divisors (see below), whose sum is σ = 49374864. Its totient is φ = 8386560.

The previous prime is 20463811. The next prime is 20463889. The reversal of 20463872 is 27836402.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475883 + ... + 475925.

Almost surely, 2^20463872 is an apocalyptic number.

20463872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20463872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24687432).

20463872 is an abundant number, since it is smaller than the sum of its proper divisors (28910992).

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

20463872 is a wasteful number, since it uses less digits than its factorization.

20463872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20463872 is about 4523.7011395538. The cubic root of 20463872 is about 273.5243136178.

The spelling of 20463872 in words is "twenty million, four hundred sixty-three thousand, eight hundred seventy-two".