15276020256421 has 4 divisors (see below), whose sum is σ = 15280690397344. Its totient is φ = 15271350115500.

The previous prime is 15276020256379. The next prime is 15276020256437. The reversal of 15276020256421 is 12465202067251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15276020256421 - 2¹⁷ = 15276020125349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15276020256461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2335065555 + ... + 2335072096.

It is an arithmetic number, because the mean of its divisors is an integer number (3820172599336).

Almost surely, 2^{15276020256421} is an apocalyptic number.

It is an amenable number.

15276020256421 is a deficient number, since it is larger than the sum of its proper divisors (4670140923).

15276020256421 is an equidigital number, since it uses as much as digits as its factorization.

15276020256421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670140922.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 15276020256421 in words is "fifteen trillion, two hundred seventy-six billion, twenty million, two hundred fifty-six thousand, four hundred twenty-one".