20590881 has 8 divisors (see below), whose sum is σ = 27480000. Its totient is φ = 13714512.

The previous prime is 20590879. The next prime is 20590883. The reversal of 20590881 is 18809502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20590879) and next prime (20590883).

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

It is not a de Polignac number, because 20590881 - 2¹ = 20590879 is a prime.

It is a super-2 number, since 2×20590881² = 847968760712322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20590883) 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, 1620 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (3435000).

Almost surely, 2^20590881 is an apocalyptic number.

It is an amenable number.

20590881 is a deficient number, since it is larger than the sum of its proper divisors (6889119).

20590881 is a wasteful number, since it uses less digits than its factorization.

20590881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20590881 is about 4537.7175980883. The cubic root of 20590881 is about 274.0890230560.

The spelling of 20590881 in words is "twenty million, five hundred ninety thousand, eight hundred eighty-one".