20485710 has 80 divisors (see below), whose sum is σ = 62970336. Its totient is φ = 4681152.

The previous prime is 20485693. The next prime is 20485711. The reversal of 20485710 is 1758402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20485711) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3864 + ... + 7476.

Almost surely, 2^20485710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20485710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31485168).

20485710 is an abundant number, since it is smaller than the sum of its proper divisors (42484626).

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

20485710 is a wasteful number, since it uses less digits than its factorization.

20485710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639 (or 3630 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20485710 is about 4526.1142274583. The cubic root of 20485710 is about 273.6215760916.

The spelling of 20485710 in words is "twenty million, four hundred eighty-five thousand, seven hundred ten".