20073881 has 4 divisors (see below), whose sum is σ = 20094564. Its totient is φ = 20053200.

The previous prime is 20073877. The next prime is 20073883. The reversal of 20073881 is 18837002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11424400 + 8649481 = 3380^2 + 2941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20073881 - 2² = 20073877 is a prime.

It is a super-2 number, since 2×20073881² = 805921396804322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20073883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8810 + ... + 10851.

It is an arithmetic number, because the mean of its divisors is an integer number (5023641).

Almost surely, 2^20073881 is an apocalyptic number.

It is an amenable number.

20073881 is a deficient number, since it is larger than the sum of its proper divisors (20683).

20073881 is a wasteful number, since it uses less digits than its factorization.

20073881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20682.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20073881 is about 4480.3884876202. The cubic root of 20073881 is about 271.7755907491.

The spelling of 20073881 in words is "twenty million, seventy-three thousand, eight hundred eighty-one".