20642241227 has 16 divisors (see below), whose sum is σ = 21812044800. Its totient is φ = 19496248992.

The previous prime is 20642241127. The next prime is 20642241229. The reversal of 20642241227 is 72214224602.

It is a cyclic number.

It is not a de Polignac number, because 20642241227 - 2²⁴ = 20625464011 is a prime.

It is a super-2 number, since 2×20642241227² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20642241193 and 20642241202.

It is not an unprimeable number, because it can be changed into a prime (20642241229) 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, 814298 + ... + 839264.

It is an arithmetic number, because the mean of its divisors is an integer number (1363252800).

Almost surely, 2^20642241227 is an apocalyptic number.

20642241227 is a deficient number, since it is larger than the sum of its proper divisors (1169803573).

20642241227 is a wasteful number, since it uses less digits than its factorization.

20642241227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25442.

The product of its (nonzero) digits is 21504, while the sum is 32.

Adding to 20642241227 its reverse (72214224602), we get a palindrome (92856465829).

The spelling of 20642241227 in words is "twenty billion, six hundred forty-two million, two hundred forty-one thousand, two hundred twenty-seven".