15423470920 has 128 divisors (see below), whose sum is σ = 42085370880. Its totient is φ = 5010048000.

The previous prime is 15423470873. The next prime is 15423470947. The reversal of 15423470920 is 2907432451.

It is a self number, because there is not a number n which added to its sum of digits gives 15423470920.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133830 + ... + 220810.

It is an arithmetic number, because the mean of its divisors is an integer number (328791960).

Almost surely, 2^15423470920 is an apocalyptic number.

15423470920 is a gapful number since it is divisible by the number (10) 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 15423470920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21042685440).

15423470920 is an abundant number, since it is smaller than the sum of its proper divisors (26661899960).

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

15423470920 is a wasteful number, since it uses less digits than its factorization.

15423470920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87047 (or 87043 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 15423470920 in words is "fifteen billion, four hundred twenty-three million, four hundred seventy thousand, nine hundred twenty".