21250641434254 has 8 divisors (see below), whose sum is σ = 31876012058688. Its totient is φ = 10625304081360.

The previous prime is 21250641434237. The next prime is 21250641434273. The reversal of 21250641434254 is 45243414605212.

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

It is a super-2 number, since 2×21250641434254² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21250641434254.

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, 6654607 + ... + 9315850.

It is an arithmetic number, because the mean of its divisors is an integer number (3984501507336).

Almost surely, 2^{21250641434254} is an apocalyptic number.

21250641434254 is a deficient number, since it is larger than the sum of its proper divisors (10625370624434).

21250641434254 is a wasteful number, since it uses less digits than its factorization.

21250641434254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16635770.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 21250641434254 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred thirty-four thousand, two hundred fifty-four".