20775131 has 8 divisors (see below), whose sum is σ = 22459584. Its totient is φ = 19103040.

The previous prime is 20775127. The next prime is 20775133. The reversal of 20775131 is 13157702.

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

It is a cyclic number.

It is not a de Polignac number, because 20775131 - 2² = 20775127 is a prime.

It is a super-2 number, since 2×20775131² = 863212136134322, 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 20775131.

It is not an unprimeable number, because it can be changed into a prime (20775133) 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, 575 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (2807448).

Almost surely, 2^20775131 is an apocalyptic number.

20775131 is a deficient number, since it is larger than the sum of its proper divisors (1684453).

20775131 is a wasteful number, since it uses less digits than its factorization.

20775131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 20775131 is about 4557.9744404724. The cubic root of 20775131 is about 274.9041252562.

The spelling of 20775131 in words is "twenty million, seven hundred seventy-five thousand, one hundred thirty-one".