20709354336 has 48 divisors (see below), whose sum is σ = 59304063168. Its totient is φ = 6275561600.

The previous prime is 20709354331. The next prime is 20709354373. The reversal of 20709354336 is 63345390702.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20709354331) 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, 9804510 + ... + 9806621.

It is an arithmetic number, because the mean of its divisors is an integer number (1235501316).

Almost surely, 2^20709354336 is an apocalyptic number.

It is an amenable number.

20709354336 is an abundant number, since it is smaller than the sum of its proper divisors (38594708832).

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

20709354336 is a wasteful number, since it uses less digits than its factorization.

20709354336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19611155 (or 19611147 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 42.

The spelling of 20709354336 in words is "twenty billion, seven hundred nine million, three hundred fifty-four thousand, three hundred thirty-six".