21403151235660 has 48 divisors (see below), whose sum is σ = 60386295416832. Its totient is φ = 5663938238400.

The previous prime is 21403151235659. The next prime is 21403151235731. The reversal of 21403151235660 is 6653215130412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1361515756 + ... + 1361531475.

It is an arithmetic number, because the mean of its divisors is an integer number (1258047821184).

Almost surely, 2^{21403151235660} is an apocalyptic number.

21403151235660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21403151235660 is an abundant number, since it is smaller than the sum of its proper divisors (38983144181172).

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

21403151235660 is a wasteful number, since it uses less digits than its factorization.

21403151235660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723047374 (or 2723047372 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 21403151235660 in words is "twenty-one trillion, four hundred three billion, one hundred fifty-one million, two hundred thirty-five thousand, six hundred sixty".