15240621340 has 24 divisors (see below), whose sum is σ = 36577491552. Its totient is φ = 5225355840.

The previous prime is 15240621313. The next prime is 15240621349. The reversal of 15240621340 is 4312604251.

15240621340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 15240621299 and 15240621308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15240621349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54430651 + ... + 54430930.

It is an arithmetic number, because the mean of its divisors is an integer number (1524062148).

Almost surely, 2^15240621340 is an apocalyptic number.

15240621340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15240621340 is an abundant number, since it is smaller than the sum of its proper divisors (21336870212).

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

15240621340 is a wasteful number, since it uses less digits than its factorization.

15240621340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108861597 (or 108861595 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 15240621340 in words is "fifteen billion, two hundred forty million, six hundred twenty-one thousand, three hundred forty".