20276925628821 has 16 divisors (see below), whose sum is σ = 27260141568000. Its totient is φ = 13405918801968.

The previous prime is 20276925628793. The next prime is 20276925628837. The reversal of 20276925628821 is 12882652967202.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20276925628821 is a prime.

It is a super-2 number, since 2×20276925628821² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20276925628721) 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, 10178161 + ... + 12006198.

It is an arithmetic number, because the mean of its divisors is an integer number (1703758848000).

Almost surely, 2^{20276925628821} is an apocalyptic number.

It is an amenable number.

20276925628821 is a deficient number, since it is larger than the sum of its proper divisors (6983215939179).

20276925628821 is a wasteful number, since it uses less digits than its factorization.

20276925628821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22186888.

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 20276925628821 in words is "twenty trillion, two hundred seventy-six billion, nine hundred twenty-five million, six hundred twenty-eight thousand, eight hundred twenty-one".