20090544738 has 32 divisors (see below), whose sum is σ = 43866178560. Its totient is φ = 6083562960.

The previous prime is 20090544737. The next prime is 20090544751. The reversal of 20090544738 is 83744509002.

It is a self number, because there is not a number n which added to its sum of digits gives 20090544738.

It is not an unprimeable number, because it can be changed into a prime (20090544737) 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, 21118 + ... + 201561.

It is an arithmetic number, because the mean of its divisors is an integer number (1370818080).

Almost surely, 2^20090544738 is an apocalyptic number.

20090544738 is an abundant number, since it is smaller than the sum of its proper divisors (23775633822).

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

20090544738 is a wasteful number, since it uses less digits than its factorization.

20090544738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224062.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 20090544738 in words is "twenty billion, ninety million, five hundred forty-four thousand, seven hundred thirty-eight".