21154925362198 has 8 divisors (see below), whose sum is σ = 32252591126160. Its totient is φ = 10404061653480.

The previous prime is 21154925362183. The next prime is 21154925362211. The reversal of 21154925362198 is 89126352945112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86700513658 + ... + 86700513901.

It is an arithmetic number, because the mean of its divisors is an integer number (4031573890770).

Almost surely, 2^{21154925362198} is an apocalyptic number.

21154925362198 is a deficient number, since it is larger than the sum of its proper divisors (11097665763962).

21154925362198 is a wasteful number, since it uses less digits than its factorization.

21154925362198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173401027622.

The product of its digits is 9331200, while the sum is 58.

The spelling of 21154925362198 in words is "twenty-one trillion, one hundred fifty-four billion, nine hundred twenty-five million, three hundred sixty-two thousand, one hundred ninety-eight".