20642206244 has 48 divisors (see below), whose sum is σ = 42077629440. Its totient is φ = 8766135840.

The previous prime is 20642206241. The next prime is 20642206261. The reversal of 20642206244 is 44260224602.

It is a super-2 number, since 2×20642206244² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20642206244.

It is not an unprimeable number, because it can be changed into a prime (20642206241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193664 + ... + 280695.

It is an arithmetic number, because the mean of its divisors is an integer number (876617280).

Almost surely, 2^20642206244 is an apocalyptic number.

It is an amenable number.

20642206244 is an abundant number, since it is smaller than the sum of its proper divisors (21435423196).

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

20642206244 is a wasteful number, since it uses less digits than its factorization.

20642206244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474440 (or 474438 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The spelling of 20642206244 in words is "twenty billion, six hundred forty-two million, two hundred six thousand, two hundred forty-four".