20567242844 has 6 divisors (see below), whose sum is σ = 35992674984. Its totient is φ = 10283621420.

The previous prime is 20567242831. The next prime is 20567242849. The reversal of 20567242844 is 44824276502.

It is a super-2 number, since 2×20567242844² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20567242795 and 20567242804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20567242849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2570905352 + ... + 2570905359.

It is an arithmetic number, because the mean of its divisors is an integer number (5998779164).

Almost surely, 2^20567242844 is an apocalyptic number.

It is an amenable number.

20567242844 is a deficient number, since it is larger than the sum of its proper divisors (15425432140).

20567242844 is a wasteful number, since it uses less digits than its factorization.

20567242844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141810715 (or 5141810713 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 44.

The spelling of 20567242844 in words is "twenty billion, five hundred sixty-seven million, two hundred forty-two thousand, eight hundred forty-four".