20195844500 has 48 divisors (see below), whose sum is σ = 47500641552. Its totient is φ = 7456924800.

The previous prime is 20195844497. The next prime is 20195844503. The reversal of 20195844500 is 544859102.

It is an interprime number because it is at equal distance from previous prime (20195844497) and next prime (20195844503).

It can be written as a sum of positive squares in 8 ways, for example, as 16907280784 + 3288563716 = 130028^2 + 57346^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195844503) 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, 1547027 + ... + 1560026.

It is an arithmetic number, because the mean of its divisors is an integer number (989596699).

Almost surely, 2^20195844500 is an apocalyptic number.

20195844500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20195844500 is an abundant number, since it is smaller than the sum of its proper divisors (27304797052).

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

20195844500 is a wasteful number, since it uses less digits than its factorization.

20195844500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107085 (or 3107073 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 20195844500 in words is "twenty billion, one hundred ninety-five million, eight hundred forty-four thousand, five hundred".