21620224323 has 16 divisors (see below), whose sum is σ = 32033450400. Its totient is φ = 14411913120.

The previous prime is 21620224291. The next prime is 21620224343. The reversal of 21620224323 is 32342202612.

It is a happy number.

21620224323 is a `hidden beast` number, since 2 + 1 + 620 + 2 + 2 + 4 + 32 + 3 = 666.

It is not a de Polignac number, because 21620224323 - 2⁵ = 21620224291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21620224343) 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, 243193 + ... + 319973.

It is an arithmetic number, because the mean of its divisors is an integer number (2002090650).

Almost surely, 2^21620224323 is an apocalyptic number.

21620224323 is a deficient number, since it is larger than the sum of its proper divisors (10413226077).

21620224323 is a wasteful number, since it uses less digits than its factorization.

21620224323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87219 (or 87213 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21620224323 its reverse (32342202612), we get a palindrome (53962426935).

The spelling of 21620224323 in words is "twenty-one billion, six hundred twenty million, two hundred twenty-four thousand, three hundred twenty-three".