20727131222 has 16 divisors (see below), whose sum is σ = 36257373600. Its totient is φ = 8883055944.

The previous prime is 20727131213. The next prime is 20727131251. The reversal of 20727131222 is 22213172702.

It is a happy number.

It is a super-2 number, since 2×20727131222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 15106553 + ... + 15107924.

It is an arithmetic number, because the mean of its divisors is an integer number (2266085850).

Almost surely, 2^20727131222 is an apocalyptic number.

20727131222 is a deficient number, since it is larger than the sum of its proper divisors (15530242378).

20727131222 is an equidigital number, since it uses as much as digits as its factorization.

20727131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30214500 (or 30214486 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 20727131222 in words is "twenty billion, seven hundred twenty-seven million, one hundred thirty-one thousand, two hundred twenty-two".