21614493765 has 32 divisors (see below), whose sum is σ = 36445288320. Its totient is φ = 10908428544.

The previous prime is 21614493751. The next prime is 21614493767. The reversal of 21614493765 is 56739441612.

It is not a de Polignac number, because 21614493765 - 2⁹ = 21614493253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614493767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206707 + ... + 293183.

It is an arithmetic number, because the mean of its divisors is an integer number (1138915260).

Almost surely, 2^21614493765 is an apocalyptic number.

It is an amenable number.

21614493765 is a deficient number, since it is larger than the sum of its proper divisors (14830794555).

21614493765 is a wasteful number, since it uses less digits than its factorization.

21614493765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87381.

The product of its digits is 1088640, while the sum is 48.

The spelling of 21614493765 in words is "twenty-one billion, six hundred fourteen million, four hundred ninety-three thousand, seven hundred sixty-five".