21699989019 has 40 divisors (see below), whose sum is σ = 32789741600. Its totient is φ = 14300250624.

The previous prime is 21699988991. The next prime is 21699989041. The reversal of 21699989019 is 91098999612.

It is not a de Polignac number, because 21699989019 - 2⁸ = 21699988763 is a prime.

It is a super-2 number, since 2×21699989019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21699989089) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12169602 + ... + 12171384.

It is an arithmetic number, because the mean of its divisors is an integer number (819743540).

Almost surely, 2^21699989019 is an apocalyptic number.

21699989019 is a deficient number, since it is larger than the sum of its proper divisors (11089752581).

21699989019 is a wasteful number, since it uses less digits than its factorization.

21699989019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441 (or 3432 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 63.

The spelling of 21699989019 in words is "twenty-one billion, six hundred ninety-nine million, nine hundred eighty-nine thousand, nineteen".