20572670773 has 6 divisors (see below), whose sum is σ = 21143717826. Its totient is φ = 20016651312.

The previous prime is 20572670759. The next prime is 20572670777. The reversal of 20572670773 is 37707627502.

It can be written as a sum of positive squares in 3 ways, for example, as 12200969764 + 8371701009 = 110458^2 + 91497^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20572670773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572670777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7512390 + ... + 7515127.

It is an arithmetic number, because the mean of its divisors is an integer number (3523952971).

Almost surely, 2^20572670773 is an apocalyptic number.

It is an amenable number.

20572670773 is a deficient number, since it is larger than the sum of its proper divisors (571047053).

20572670773 is an equidigital number, since it uses as much as digits as its factorization.

20572670773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15027591 (or 15027554 counting only the distinct ones).

The product of its (nonzero) digits is 864360, while the sum is 46.

The spelling of 20572670773 in words is "twenty billion, five hundred seventy-two million, six hundred seventy thousand, seven hundred seventy-three".