20106267631 has 4 divisors (see below), whose sum is σ = 20108308264. Its totient is φ = 20104227000.

The previous prime is 20106267607. The next prime is 20106267667. The reversal of 20106267631 is 13676260102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20106267631 - 2¹¹ = 20106265583 is a prime.

It is a super-2 number, since 2×20106267631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106267691) 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, 1005465 + ... + 1025266.

It is an arithmetic number, because the mean of its divisors is an integer number (5027077066).

Almost surely, 2^20106267631 is an apocalyptic number.

20106267631 is a deficient number, since it is larger than the sum of its proper divisors (2040633).

20106267631 is an equidigital number, since it uses as much as digits as its factorization.

20106267631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040632.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 20106267631 in words is "twenty billion, one hundred six million, two hundred sixty-seven thousand, six hundred thirty-one".