20276512221 has 32 divisors (see below), whose sum is σ = 32758698240. Its totient is φ = 10890464256.

The previous prime is 20276512189. The next prime is 20276512253. The reversal of 20276512221 is 12221567202.

It is an interprime number because it is at equal distance from previous prime (20276512189) and next prime (20276512253).

It is not a de Polignac number, because 20276512221 - 2⁵ = 20276512189 is a prime.

It is a super-2 number, since 2×20276512221² (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 (20276512021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232735 + ... + 307763.

It is an arithmetic number, because the mean of its divisors is an integer number (1023709320).

Almost surely, 2^20276512221 is an apocalyptic number.

20276512221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20276512221 is a deficient number, since it is larger than the sum of its proper divisors (12482186019).

20276512221 is a wasteful number, since it uses less digits than its factorization.

20276512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75813.

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 20276512221 in words is "twenty billion, two hundred seventy-six million, five hundred twelve thousand, two hundred twenty-one".