20456016 has 80 divisors (see below), whose sum is σ = 63043584. Its totient is φ = 5588352.

The previous prime is 20455979. The next prime is 20456041. The reversal of 20456016 is 61065402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6405 + ... + 9051.

Almost surely, 2^20456016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20456016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31521792).

20456016 is an abundant number, since it is smaller than the sum of its proper divisors (42587568).

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

20456016 is a wasteful number, since it uses less digits than its factorization.

20456016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20456016 is about 4522.8327406615. The cubic root of 20456016 is about 273.4893075016.

The spelling of 20456016 in words is "twenty million, four hundred fifty-six thousand, sixteen".