21146683506877 has 8 divisors (see below), whose sum is σ = 21873292515072. Its totient is φ = 20422853119200.

The previous prime is 21146683506853. The next prime is 21146683506881. The reversal of 21146683506877 is 77860538664112.

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 21146683506877 - 2¹⁵ = 21146683474109 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 (21146683506577) 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, 694639648 + ... + 694670089.

It is an arithmetic number, because the mean of its divisors is an integer number (2734161564384).

Almost surely, 2^{21146683506877} is an apocalyptic number.

It is an amenable number.

21146683506877 is a deficient number, since it is larger than the sum of its proper divisors (726609008195).

21146683506877 is a wasteful number, since it uses less digits than its factorization.

21146683506877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389310259.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 21146683506877 in words is "twenty-one trillion, one hundred forty-six billion, six hundred eighty-three million, five hundred six thousand, eight hundred seventy-seven".