21232887877 has 8 divisors (see below), whose sum is σ = 22014381312. Its totient is φ = 20457429600.

The previous prime is 21232887787. The next prime is 21232887883. The reversal of 21232887877 is 77878823212.

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 21232887877 - 2¹¹ = 21232885829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232887887) 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, 1501624 + ... + 1515697.

It is an arithmetic number, because the mean of its divisors is an integer number (2751797664).

Almost surely, 2^21232887877 is an apocalyptic number.

It is an amenable number.

21232887877 is a deficient number, since it is larger than the sum of its proper divisors (781493435).

21232887877 is a wasteful number, since it uses less digits than its factorization.

21232887877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017579.

The product of its digits is 4214784, while the sum is 55.

It can be divided in two parts, 2123 and 2887877, that added together give a square (2890000 = 1700²).

The spelling of 21232887877 in words is "twenty-one billion, two hundred thirty-two million, eight hundred eighty-seven thousand, eight hundred seventy-seven".