21454999374 has 16 divisors (see below), whose sum is σ = 44294192640. Its totient is φ = 6920967480.

The previous prime is 21454999303. The next prime is 21454999393. The reversal of 21454999374 is 47399945412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57674544 + ... + 57674915.

It is an arithmetic number, because the mean of its divisors is an integer number (2768387040).

Almost surely, 2^21454999374 is an apocalyptic number.

21454999374 is an abundant number, since it is smaller than the sum of its proper divisors (22839193266).

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

21454999374 is a wasteful number, since it uses less digits than its factorization.

21454999374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115349495.

The product of its digits is 9797760, while the sum is 57.

The spelling of 21454999374 in words is "twenty-one billion, four hundred fifty-four million, nine hundred ninety-nine thousand, three hundred seventy-four".