20827602881 has 8 divisors (see below), whose sum is σ = 20871015360. Its totient is φ = 20784233232.

The previous prime is 20827602869. The next prime is 20827602907. The reversal of 20827602881 is 18820672802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20827602881 - 2²² = 20823408577 is a prime.

It is a super-2 number, since 2×20827602881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20827602811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074431 + ... + 1093643.

It is an arithmetic number, because the mean of its divisors is an integer number (2608876920).

Almost surely, 2^20827602881 is an apocalyptic number.

It is an amenable number.

20827602881 is a deficient number, since it is larger than the sum of its proper divisors (43412479).

20827602881 is a wasteful number, since it uses less digits than its factorization.

20827602881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21415.

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 20827602881 in words is "twenty billion, eight hundred twenty-seven million, six hundred two thousand, eight hundred eighty-one".