20442764 has 24 divisors (see below), whose sum is σ = 37838976. Its totient is φ = 9648000.

The previous prime is 20442749. The next prime is 20442769. The reversal of 20442764 is 46724402.

It is not an unprimeable number, because it can be changed into a prime (20442769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3074 + ... + 7094.

It is an arithmetic number, because the mean of its divisors is an integer number (1576624).

Almost surely, 2^20442764 is an apocalyptic number.

It is an amenable number.

20442764 is a deficient number, since it is larger than the sum of its proper divisors (17396212).

20442764 is a wasteful number, since it uses less digits than its factorization.

20442764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 20442764 is about 4521.3674922528. The cubic root of 20442764 is about 273.4302366441.

The spelling of 20442764 in words is "twenty million, four hundred forty-two thousand, seven hundred sixty-four".