20880128831 has 8 divisors (see below), whose sum is σ = 21988070400. Its totient is φ = 19773086040.

The previous prime is 20880128777. The next prime is 20880128839. The reversal of 20880128831 is 13882108802.

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 20880128831 - 2⁶ = 20880128767 is a prime.

It is a super-2 number, since 2×20880128831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880128839) 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, 176735 + ... + 270176.

It is an arithmetic number, because the mean of its divisors is an integer number (2748508800).

Almost surely, 2^20880128831 is an apocalyptic number.

20880128831 is a deficient number, since it is larger than the sum of its proper divisors (1107941569).

20880128831 is a wasteful number, since it uses less digits than its factorization.

20880128831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449389.

The product of its (nonzero) digits is 49152, while the sum is 41.

The spelling of 20880128831 in words is "twenty billion, eight hundred eighty million, one hundred twenty-eight thousand, eight hundred thirty-one".