20642241216 has 56 divisors (see below), whose sum is σ = 54702805504. Its totient is φ = 6869802240.

The previous prime is 20642241127. The next prime is 20642241229. The reversal of 20642241216 is 61214224602.

It is a super-2 number, since 2×20642241216² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35961 + ... + 206343.

Almost surely, 2^20642241216 is an apocalyptic number.

It is an amenable number.

20642241216 is an abundant number, since it is smaller than the sum of its proper divisors (34060564288).

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

20642241216 is a wasteful number, since it uses less digits than its factorization.

20642241216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171029 (or 171019 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 20642241216 its reverse (61214224602), we get a palindrome (81856465818).

The spelling of 20642241216 in words is "twenty billion, six hundred forty-two million, two hundred forty-one thousand, two hundred sixteen".