21719369308 has 24 divisors (see below), whose sum is σ = 46780180832. Its totient is φ = 8592277824.

The previous prime is 21719369299. The next prime is 21719369317. The reversal of 21719369308 is 80396391712.

It is an interprime number because it is at equal distance from previous prime (21719369299) and next prime (21719369317).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29833935 + ... + 29834662.

Almost surely, 2^21719369308 is an apocalyptic number.

21719369308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21719369308 is an abundant number, since it is smaller than the sum of its proper divisors (25060811524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21719369308 is a wasteful number, since it uses less digits than its factorization.

21719369308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59668621 (or 59668619 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 21719369308 in words is "twenty-one billion, seven hundred nineteen million, three hundred sixty-nine thousand, three hundred eight".