21114532723 has 16 divisors (see below), whose sum is σ = 21732663456. Its totient is φ = 20501544960.

The previous prime is 21114532717. The next prime is 21114532757. The reversal of 21114532723 is 32723541112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21114532723 is a prime.

It is a super-2 number, since 2×21114532723² (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 (21114532123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14795736 + ... + 14797162.

It is an arithmetic number, because the mean of its divisors is an integer number (1358291466).

Almost surely, 2^21114532723 is an apocalyptic number.

21114532723 is a deficient number, since it is larger than the sum of its proper divisors (618130733).

21114532723 is a wasteful number, since it uses less digits than its factorization.

21114532723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934.

The product of its digits is 10080, while the sum is 31.

The spelling of 21114532723 in words is "twenty-one billion, one hundred fourteen million, five hundred thirty-two thousand, seven hundred twenty-three".