20886926381 has 4 divisors (see below), whose sum is σ = 20980589952. Its totient is φ = 20793262812.

The previous prime is 20886926363. The next prime is 20886926519. The reversal of 20886926381 is 18362968802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20886926381 - 2⁶ = 20886926317 is a prime.

It is a super-2 number, since 2×20886926381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886926321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46831451 + ... + 46831896.

It is an arithmetic number, because the mean of its divisors is an integer number (5245147488).

Almost surely, 2^20886926381 is an apocalyptic number.

It is an amenable number.

20886926381 is a deficient number, since it is larger than the sum of its proper divisors (93663571).

20886926381 is an equidigital number, since it uses as much as digits as its factorization.

20886926381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93663570.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 20886926381 in words is "twenty billion, eight hundred eighty-six million, nine hundred twenty-six thousand, three hundred eighty-one".