20404753 has 2 divisors, whose sum is σ = 20404754. Its totient is φ = 20404752.

The previous prime is 20404739. The next prime is 20404759. The reversal of 20404753 is 35740402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 762129 = 4432^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404753 - 2¹⁷ = 20273681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202376 + 10202377.

It is an arithmetic number, because the mean of its divisors is an integer number (10202377).

Almost surely, 2^20404753 is an apocalyptic number.

It is an amenable number.

20404753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404753 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 20404753 = (42350047)₉.

20404753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20404753 is about 4517.1620515541. The cubic root of 20404753 is about 273.2606606653.

The spelling of 20404753 in words is "twenty million, four hundred four thousand, seven hundred fifty-three".