20523133615 has 16 divisors (see below), whose sum is σ = 24875425152. Its totient is φ = 16254054144.

The previous prime is 20523133583. The next prime is 20523133633. The reversal of 20523133615 is 51633132502.

It is a cyclic number.

It is not a de Polignac number, because 20523133615 - 2⁵ = 20523133583 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 15 ways as a sum of consecutive naturals, for example, 210577 + ... + 292213.

It is an arithmetic number, because the mean of its divisors is an integer number (1554714072).

Almost surely, 2^20523133615 is an apocalyptic number.

20523133615 is a deficient number, since it is larger than the sum of its proper divisors (4352291537).

20523133615 is a wasteful number, since it uses less digits than its factorization.

20523133615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82146.

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 20523133615 in words is "twenty billion, five hundred twenty-three million, one hundred thirty-three thousand, six hundred fifteen".