20460881 has 12 divisors (see below), whose sum is σ = 23926320. Its totient is φ = 17445960.

The previous prime is 20460871. The next prime is 20460887. The reversal of 20460881 is 18806402.

It is not a de Polignac number, because 20460881 - 2¹⁴ = 20444497 is a prime.

It is a super-2 number, since 2×20460881² = 837295302592322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20460887) 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 11 ways as a sum of consecutive naturals, for example, 9350 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (1993860).

Almost surely, 2^20460881 is an apocalyptic number.

It is an amenable number.

20460881 is a deficient number, since it is larger than the sum of its proper divisors (3465439).

20460881 is a wasteful number, since it uses less digits than its factorization.

20460881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20460881 is about 4523.3705353420. The cubic root of 20460881 is about 273.5109868618.

The spelling of 20460881 in words is "twenty million, four hundred sixty thousand, eight hundred eighty-one".