21092945751 has 16 divisors (see below), whose sum is σ = 31252197600. Its totient is φ = 14060438784.

The previous prime is 21092945723. The next prime is 21092945837. The reversal of 21092945751 is 15754929012.

It is not a de Polignac number, because 21092945751 - 2⁵ = 21092945719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21092945697 and 21092945706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21092945711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247185 + ... + 321381.

It is an arithmetic number, because the mean of its divisors is an integer number (1953262350).

Almost surely, 2^21092945751 is an apocalyptic number.

21092945751 is a deficient number, since it is larger than the sum of its proper divisors (10159251849).

21092945751 is a wasteful number, since it uses less digits than its factorization.

21092945751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84735 (or 84729 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 21092945751 in words is "twenty-one billion, ninety-two million, nine hundred forty-five thousand, seven hundred fifty-one".