20764480 has 112 divisors (see below), whose sum is σ = 57278016. Its totient is φ = 7086080.

The previous prime is 20764427. The next prime is 20764487. The reversal of 20764480 is 8446702.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59667 + ... + 60013.

Almost surely, 2^20764480 is an apocalyptic number.

20764480 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 20764480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28639008).

20764480 is an abundant number, since it is smaller than the sum of its proper divisors (36513536).

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

20764480 is a wasteful number, since it uses less digits than its factorization.

20764480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20764480 is about 4556.8058988726. The cubic root of 20764480 is about 274.8571379174.

It can be divided in two parts, 2076 and 4480, that added together give a palindrome (6556).

The spelling of 20764480 in words is "twenty million, seven hundred sixty-four thousand, four hundred eighty".