20154382197 has 8 divisors (see below), whose sum is σ = 26874033120. Its totient is φ = 13435493040.

The previous prime is 20154382169. The next prime is 20154382217. The reversal of 20154382197 is 79128345102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20154382197 - 2¹⁵ = 20154349429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154382117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125547 + ... + 236792.

It is an arithmetic number, because the mean of its divisors is an integer number (3359254140).

Almost surely, 2^20154382197 is an apocalyptic number.

It is an amenable number.

20154382197 is a deficient number, since it is larger than the sum of its proper divisors (6719650923).

20154382197 is a wasteful number, since it uses less digits than its factorization.

20154382197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380883.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 20154382197 in words is "twenty billion, one hundred fifty-four million, three hundred eighty-two thousand, one hundred ninety-seven".