20630764 has 48 divisors (see below), whose sum is σ = 45964800. Its totient is φ = 8032080.

The previous prime is 20630761. The next prime is 20630767. The reversal of 20630764 is 46703602.

It is an interprime number because it is at equal distance from previous prime (20630761) and next prime (20630767).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630761) 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, 14409 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^20630764 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 20630764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22982400).

20630764 is an abundant number, since it is smaller than the sum of its proper divisors (25334036).

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

20630764 is a wasteful number, since it uses less digits than its factorization.

20630764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 20630764 is about 4542.1100823296. The cubic root of 20630764 is about 274.2658722522.

The spelling of 20630764 in words is "twenty million, six hundred thirty thousand, seven hundred sixty-four".