20196121847 has 24 divisors (see below), whose sum is σ = 22693109040. Its totient is φ = 17824930560.

The previous prime is 20196121837. The next prime is 20196121861. The reversal of 20196121847 is 74812169102.

It is not a de Polignac number, because 20196121847 - 2⁸ = 20196121591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20196121807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8567393 + ... + 8569749.

It is an arithmetic number, because the mean of its divisors is an integer number (945546210).

Almost surely, 2^20196121847 is an apocalyptic number.

20196121847 is a deficient number, since it is larger than the sum of its proper divisors (2496987193).

20196121847 is a wasteful number, since it uses less digits than its factorization.

20196121847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011 (or 2974 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 20196121847 in words is "twenty billion, one hundred ninety-six million, one hundred twenty-one thousand, eight hundred forty-seven".