20193001900 has 18 divisors (see below), whose sum is σ = 43818814340. Its totient is φ = 8077200720.

The previous prime is 20193001891. The next prime is 20193001903. The reversal of 20193001900 is 910039102.

It is a super-3 number, since 3×20193001900³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20193001903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100964910 + ... + 100965109.

Almost surely, 2^20193001900 is an apocalyptic number.

20193001900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20193001900 is an abundant number, since it is smaller than the sum of its proper divisors (23625812440).

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

20193001900 is a wasteful number, since it uses less digits than its factorization.

20193001900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201930033 (or 201930026 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The spelling of 20193001900 in words is "twenty billion, one hundred ninety-three million, one thousand, nine hundred".