20690544610 has 16 divisors (see below), whose sum is σ = 37691692416. Its totient is φ = 8176504048.

The previous prime is 20690544607. The next prime is 20690544619. The reversal of 20690544610 is 1644509602.

It is a self number, because there is not a number n which added to its sum of digits gives 20690544610.

It is not an unprimeable number, because it can be changed into a prime (20690544619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12463354 + ... + 12465013.

It is an arithmetic number, because the mean of its divisors is an integer number (2355730776).

Almost surely, 2^20690544610 is an apocalyptic number.

20690544610 is a deficient number, since it is larger than the sum of its proper divisors (17001147806).

20690544610 is a wasteful number, since it uses less digits than its factorization.

20690544610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24928457.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 20690544610 in words is "twenty billion, six hundred ninety million, five hundred forty-four thousand, six hundred ten".