21430902659499 has 80 divisors (see below), whose sum is σ = 34269952992000. Its totient is φ = 13316958627840.

The previous prime is 21430902659497. The next prime is 21430902659513. The reversal of 21430902659499 is 99495620903412.

21430902659499 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 0 + 90 + 2 + 6 + 59 + 499 = 666.

It is not a de Polignac number, because 21430902659499 - 2¹ = 21430902659497 is a prime.

It is a super-2 number, since 2×21430902659499² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21430902659497) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 29423187 + ... + 30142755.

It is an arithmetic number, because the mean of its divisors is an integer number (428374412400).

Almost surely, 2^{21430902659499} is an apocalyptic number.

21430902659499 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21430902659499 is a deficient number, since it is larger than the sum of its proper divisors (12839050332501).

21430902659499 is a wasteful number, since it uses less digits than its factorization.

21430902659499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720050 (or 720041 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 21430902659499 in words is "twenty-one trillion, four hundred thirty billion, nine hundred two million, six hundred fifty-nine thousand, four hundred ninety-nine".