20612610642 has 64 divisors (see below), whose sum is σ = 44898739200. Its totient is φ = 6270986304.

The previous prime is 20612610581. The next prime is 20612610643. The reversal of 20612610642 is 24601621602.

It is not an unprimeable number, because it can be changed into a prime (20612610643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2526013 + ... + 2534159.

It is an arithmetic number, because the mean of its divisors is an integer number (701542800).

Almost surely, 2^20612610642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20612610642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22449369600).

20612610642 is an abundant number, since it is smaller than the sum of its proper divisors (24286128558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20612610642 is a wasteful number, since it uses less digits than its factorization.

20612610642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 20612610642 in words is "twenty billion, six hundred twelve million, six hundred ten thousand, six hundred forty-two".