21923154120 has 256 divisors, whose sum is σ = 78579302400. Its totient is φ = 4787527680.

The previous prime is 21923154119. The next prime is 21923154133. The reversal of 21923154120 is 2145132912.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2051832 + ... + 2062488.

It is an arithmetic number, because the mean of its divisors is an integer number (306950400).

Almost surely, 2^21923154120 is an apocalyptic number.

21923154120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21923154120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39289651200).

21923154120 is an abundant number, since it is smaller than the sum of its proper divisors (56656148280).

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

21923154120 is a wasteful number, since it uses less digits than its factorization.

21923154120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10788 (or 10784 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 21923154120 in words is "twenty-one billion, nine hundred twenty-three million, one hundred fifty-four thousand, one hundred twenty".