20196121848 has 96 divisors (see below), whose sum is σ = 59477356800. Its totient is φ = 5697252288.

The previous prime is 20196121837. The next prime is 20196121861. The reversal of 20196121848 is 84812169102.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15790 + ... + 201597.

It is an arithmetic number, because the mean of its divisors is an integer number (619555800).

Almost surely, 2^20196121848 is an apocalyptic number.

20196121848 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20196121848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29738678400).

20196121848 is an abundant number, since it is smaller than the sum of its proper divisors (39281234952).

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

20196121848 is a wasteful number, since it uses less digits than its factorization.

20196121848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217489 (or 217478 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 20196121848 in words is "twenty billion, one hundred ninety-six million, one hundred twenty-one thousand, eight hundred forty-eight".