20022631 has 2 divisors, whose sum is σ = 20022632. Its totient is φ = 20022630.

The previous prime is 20022619. The next prime is 20022677. The reversal of 20022631 is 13622002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20022631 - 2⁷ = 20022503 is a prime.

It is a super-2 number, since 2×20022631² = 801811504324322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011315 + 10011316.

It is an arithmetic number, because the mean of its divisors is an integer number (10011316).

Almost surely, 2^20022631 is an apocalyptic number.

20022631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022631 is an equidigital number, since it uses as much as digits as its factorization.

20022631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20022631 is about 4474.6654623558. The cubic root of 20022631 is about 271.5441063749.

Adding to 20022631 its reverse (13622002), we get a palindrome (33644633).

The spelling of 20022631 in words is "twenty million, twenty-two thousand, six hundred thirty-one".