20644540710 has 16 divisors (see below), whose sum is σ = 49546897776. Its totient is φ = 5505210848.

The previous prime is 20644540667. The next prime is 20644540717. The reversal of 20644540710 is 1704544602.

It is a super-2 number, since 2×20644540710² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20644540717) 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, 344075649 + ... + 344075708.

It is an arithmetic number, because the mean of its divisors is an integer number (3096681111).

Almost surely, 2^20644540710 is an apocalyptic number.

20644540710 is an abundant number, since it is smaller than the sum of its proper divisors (28902357066).

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

20644540710 is a wasteful number, since it uses less digits than its factorization.

20644540710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688151367.

The product of its (nonzero) digits is 26880, while the sum is 33.

The spelling of 20644540710 in words is "twenty billion, six hundred forty-four million, five hundred forty thousand, seven hundred ten".