20754631 has 4 divisors (see below), whose sum is σ = 21847000. Its totient is φ = 19662264.

The previous prime is 20754623. The next prime is 20754653. The reversal of 20754631 is 13645702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20754631 - 2³ = 20754623 is a prime.

It is a super-2 number, since 2×20754631² = 861509415892322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20754631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20754611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546156 + ... + 546193.

It is an arithmetic number, because the mean of its divisors is an integer number (5461750).

Almost surely, 2^20754631 is an apocalyptic number.

20754631 is a deficient number, since it is larger than the sum of its proper divisors (1092369).

20754631 is a wasteful number, since it uses less digits than its factorization.

20754631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092368.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20754631 is about 4555.7250795016. The cubic root of 20754631 is about 274.8136743349.

The spelling of 20754631 in words is "twenty million, seven hundred fifty-four thousand, six hundred thirty-one".