20402753 has 8 divisors (see below), whose sum is σ = 23366208. Its totient is φ = 17451504.

The previous prime is 20402741. The next prime is 20402761. The reversal of 20402753 is 35720402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20402753 - 2⁸ = 20402497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20402153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875 + ... + 6447.

It is an arithmetic number, because the mean of its divisors is an integer number (2920776).

Almost surely, 2^20402753 is an apocalyptic number.

It is an amenable number.

20402753 is a deficient number, since it is larger than the sum of its proper divisors (2963455).

20402753 is an equidigital number, since it uses as much as digits as its factorization.

20402753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20402753 is about 4516.9406681957. The cubic root of 20402753 is about 273.2517323668.

The spelling of 20402753 in words is "twenty million, four hundred two thousand, seven hundred fifty-three".