20572670669 has 2 divisors, whose sum is σ = 20572670670. Its totient is φ = 20572670668.

The previous prime is 20572670663. The next prime is 20572670681. The reversal of 20572670669 is 96607627502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19158158569 + 1414512100 = 138413^2 + 37610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20572670669 - 2⁴ = 20572670653 is a prime.

It is a super-2 number, since 2×20572670669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20572670663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286335334 + 10286335335.

It is an arithmetic number, because the mean of its divisors is an integer number (10286335335).

Almost surely, 2^20572670669 is an apocalyptic number.

It is an amenable number.

20572670669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572670669 is an equidigital number, since it uses as much as digits as its factorization.

20572670669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 20572670669 in words is "twenty billion, five hundred seventy-two million, six hundred seventy thousand, six hundred sixty-nine".