21114587920751 has 8 divisors (see below), whose sum is σ = 22790583779040. Its totient is φ = 19445991603552.

The previous prime is 21114587920747. The next prime is 21114587920799. The reversal of 21114587920751 is 15702978541112.

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

It is a cyclic number.

It is not a de Polignac number, because 21114587920751 - 2² = 21114587920747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21114587920693 and 21114587920702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114587920711) 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, 1849879340 + ... + 1849890753.

It is an arithmetic number, because the mean of its divisors is an integer number (2848822972380).

Almost surely, 2^{21114587920751} is an apocalyptic number.

21114587920751 is a deficient number, since it is larger than the sum of its proper divisors (1675995858289).

21114587920751 is a wasteful number, since it uses less digits than its factorization.

21114587920751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699770545.

The product of its (nonzero) digits is 1411200, while the sum is 53.

The spelling of 21114587920751 in words is "twenty-one trillion, one hundred fourteen billion, five hundred eighty-seven million, nine hundred twenty thousand, seven hundred fifty-one".