21619392827 has 4 divisors (see below), whose sum is σ = 21622255200. Its totient is φ = 21616530456.

The previous prime is 21619392793. The next prime is 21619392853. The reversal of 21619392827 is 72829391612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21619392827 - 2¹² = 21619388731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21619392227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1419827 + ... + 1434972.

It is an arithmetic number, because the mean of its divisors is an integer number (5405563800).

Almost surely, 2^21619392827 is an apocalyptic number.

21619392827 is a deficient number, since it is larger than the sum of its proper divisors (2862373).

21619392827 is an equidigital number, since it uses as much as digits as its factorization.

21619392827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862372.

The product of its digits is 653184, while the sum is 50.

The spelling of 21619392827 in words is "twenty-one billion, six hundred nineteen million, three hundred ninety-two thousand, eight hundred twenty-seven".