21519428152 has 8 divisors (see below), whose sum is σ = 40348927800. Its totient is φ = 10759714072.

The previous prime is 21519428111. The next prime is 21519428219. The reversal of 21519428152 is 25182491512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344964252 + ... + 1344964267.

It is an arithmetic number, because the mean of its divisors is an integer number (5043615975).

Almost surely, 2^21519428152 is an apocalyptic number.

It is an amenable number.

21519428152 is a deficient number, since it is larger than the sum of its proper divisors (18829499648).

21519428152 is a wasteful number, since it uses less digits than its factorization.

21519428152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689928525 (or 2689928521 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The spelling of 21519428152 in words is "twenty-one billion, five hundred nineteen million, four hundred twenty-eight thousand, one hundred fifty-two".