20626061 has 2 divisors, whose sum is σ = 20626062. Its totient is φ = 20626060.

The previous prime is 20626051. The next prime is 20626079. The reversal of 20626061 is 16062602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20529961 + 96100 = 4531^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 20626061 - 2²² = 16431757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20626051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313030 + 10313031.

It is an arithmetic number, because the mean of its divisors is an integer number (10313031).

Almost surely, 2^20626061 is an apocalyptic number.

It is an amenable number.

20626061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20626061 is an equidigital number, since it uses as much as digits as its factorization.

20626061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20626061 is about 4541.5923418995. The cubic root of 20626061 is about 274.2450300701.

Adding to 20626061 its reverse (16062602), we get a palindrome (36688663).

The spelling of 20626061 in words is "twenty million, six hundred twenty-six thousand, sixty-one".