20612061615 has 16 divisors (see below), whose sum is σ = 32984212608. Its totient is φ = 10991461536.

The previous prime is 20612061611. The next prime is 20612061703. The reversal of 20612061615 is 51616021602.

It is not a de Polignac number, because 20612061615 - 2² = 20612061611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612061611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5304 + ... + 203106.

It is an arithmetic number, because the mean of its divisors is an integer number (2061513288).

Almost surely, 2^20612061615 is an apocalyptic number.

20612061615 is a deficient number, since it is larger than the sum of its proper divisors (12372150993).

20612061615 is a wasteful number, since it uses less digits than its factorization.

20612061615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204758.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 20612061615 in words is "twenty billion, six hundred twelve million, sixty-one thousand, six hundred fifteen".