21323100030 has 64 divisors (see below), whose sum is σ = 51388674048. Its totient is φ = 5662517760.

The previous prime is 21323100023. The next prime is 21323100031. The reversal of 21323100030 is 3000132312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 21323099982 and 21323100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323100031) 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, 14983899 + ... + 14985321.

It is an arithmetic number, because the mean of its divisors is an integer number (802948032).

Almost surely, 2^21323100030 is an apocalyptic number.

21323100030 is an abundant number, since it is smaller than the sum of its proper divisors (30065574018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323100030 is a wasteful number, since it uses less digits than its factorization.

21323100030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21323100030 its reverse (3000132312), we get a palindrome (24323232342).

The spelling of 21323100030 in words is "twenty-one billion, three hundred twenty-three million, one hundred thousand, thirty".