20464080 has 160 divisors (see below), whose sum is σ = 78161664. Its totient is φ = 4313088.

The previous prime is 20464063. The next prime is 20464099. The reversal of 20464080 is 8046402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20464080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21372 + ... + 22308.

Almost surely, 2^20464080 is an apocalyptic number.

20464080 is a gapful number since it is divisible by the number (20) 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 20464080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39080832).

20464080 is an abundant number, since it is smaller than the sum of its proper divisors (57697584).

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

20464080 is a wasteful number, since it uses less digits than its factorization.

20464080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20464080 is about 4523.7241295198. The cubic root of 20464080 is about 273.5252403382.

The spelling of 20464080 in words is "twenty million, four hundred sixty-four thousand, eighty".