21862309149 has 24 divisors (see below), whose sum is σ = 32737565952. Its totient is φ = 14044138560.

The previous prime is 21862309121. The next prime is 21862309153. The reversal of 21862309149 is 94190326812.

21862309149 is a `hidden beast` number, since 2 + 1 + 8 + 623 + 0 + 9 + 14 + 9 = 666.

It is not a de Polignac number, because 21862309149 - 2⁸ = 21862308893 is a prime.

It is a super-2 number, since 2×21862309149² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21862309849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103147 + ... + 233160.

It is an arithmetic number, because the mean of its divisors is an integer number (1364065248).

Almost surely, 2^21862309149 is an apocalyptic number.

It is an amenable number.

21862309149 is a deficient number, since it is larger than the sum of its proper divisors (10875256803).

21862309149 is a wasteful number, since it uses less digits than its factorization.

21862309149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336577 (or 336574 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 21862309149 in words is "twenty-one billion, eight hundred sixty-two million, three hundred nine thousand, one hundred forty-nine".