21436517036 has 24 divisors (see below), whose sum is σ = 41875990464. Its totient is φ = 9517268880.

The previous prime is 21436516973. The next prime is 21436517059. The reversal of 21436517036 is 63071563412.

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, 5663150 + ... + 5666933.

It is an arithmetic number, because the mean of its divisors is an integer number (1744832936).

Almost surely, 2^21436517036 is an apocalyptic number.

It is an amenable number.

21436517036 is a deficient number, since it is larger than the sum of its proper divisors (20439473428).

21436517036 is a wasteful number, since it uses less digits than its factorization.

21436517036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11330141 (or 11330139 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 21436517036 in words is "twenty-one billion, four hundred thirty-six million, five hundred seventeen thousand, thirty-six".