20642282870 has 64 divisors (see below), whose sum is σ = 41524344576. Its totient is φ = 7323281280.

The previous prime is 20642282867. The next prime is 20642282873. The reversal of 20642282870 is 7828224602.

It is an interprime number because it is at equal distance from previous prime (20642282867) and next prime (20642282873).

It is a super-2 number, since 2×20642282870² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642282873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5281457 + ... + 5285363.

It is an arithmetic number, because the mean of its divisors is an integer number (648817884).

Almost surely, 2^20642282870 is an apocalyptic number.

20642282870 is an abundant number, since it is smaller than the sum of its proper divisors (20882061706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20642282870 is a wasteful number, since it uses less digits than its factorization.

20642282870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 20642282870 in words is "twenty billion, six hundred forty-two million, two hundred eighty-two thousand, eight hundred seventy".