21051364636154 has 8 divisors (see below), whose sum is σ = 31577150427840. Its totient is φ = 10525647826876.

The previous prime is 21051364636079. The next prime is 21051364636163. The reversal of 21051364636154 is 45163646315012.

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

It is a super-3 number, since 3×21051364636154³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21051364636099 and 21051364636108.

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, 16475804 + ... + 17707479.

It is an arithmetic number, because the mean of its divisors is an integer number (3947143803480).

Almost surely, 2^{21051364636154} is an apocalyptic number.

21051364636154 is a deficient number, since it is larger than the sum of its proper divisors (10525785791686).

21051364636154 is a wasteful number, since it uses less digits than its factorization.

21051364636154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34491204.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 21051364636154 in words is "twenty-one trillion, fifty-one billion, three hundred sixty-four million, six hundred thirty-six thousand, one hundred fifty-four".