21142651015 has 8 divisors (see below), whose sum is σ = 25989990768. Its totient is φ = 16501581120.

The previous prime is 21142650989. The next prime is 21142651027. The reversal of 21142651015 is 51015624112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21142651015 - 2¹⁵ = 21142618247 is a prime.

It is a Duffinian 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, 51567237 + ... + 51567646.

It is an arithmetic number, because the mean of its divisors is an integer number (3248748846).

Almost surely, 2^21142651015 is an apocalyptic number.

21142651015 is a deficient number, since it is larger than the sum of its proper divisors (4847339753).

21142651015 is a wasteful number, since it uses less digits than its factorization.

21142651015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103134929.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 21142651015 in words is "twenty-one billion, one hundred forty-two million, six hundred fifty-one thousand, fifteen".