20102764 has 12 divisors (see below), whose sum is σ = 38378088. Its totient is φ = 9137600.

The previous prime is 20102743. The next prime is 20102807. The reversal of 20102764 is 46720102.

It is a super-2 number, since 2×20102764² = 808242240879392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228397 + ... + 228484.

It is an arithmetic number, because the mean of its divisors is an integer number (3198174).

Almost surely, 2^20102764 is an apocalyptic number.

It is an amenable number.

20102764 is a deficient number, since it is larger than the sum of its proper divisors (18275324).

20102764 is a wasteful number, since it uses less digits than its factorization.

20102764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456896 (or 456894 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20102764 is about 4483.6105986136. The cubic root of 20102764 is about 271.9058750156.

Adding to 20102764 its reverse (46720102), we get a palindrome (66822866).

It can be divided in two parts, 2010 and 2764, that added together give a palindrome (4774).

The spelling of 20102764 in words is "twenty million, one hundred two thousand, seven hundred sixty-four".