20485764 has 48 divisors (see below), whose sum is σ = 57200640. Its totient is φ = 6302880.

The previous prime is 20485757. The next prime is 20485769. The reversal of 20485764 is 46758402.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20485769) 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, 5892 + ... + 8699.

It is an arithmetic number, because the mean of its divisors is an integer number (1191680).

Almost surely, 2^20485764 is an apocalyptic number.

It is an amenable number.

20485764 is an abundant number, since it is smaller than the sum of its proper divisors (36714876).

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

20485764 is a wasteful number, since it uses less digits than its factorization.

20485764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617 (or 14609 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 20485764 is about 4526.1201928362. The cubic root of 20485764 is about 273.6218165121.

The spelling of 20485764 in words is "twenty million, four hundred eighty-five thousand, seven hundred sixty-four".