21735563551451 has 8 divisors (see below), whose sum is σ = 22768839375264. Its totient is φ = 20709642004480.

The previous prime is 21735563551421. The next prime is 21735563551489. The reversal of 21735563551451 is 15415536553712.

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 21735563551451 - 2³⁴ = 21718383682267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21735563551393 and 21735563551402.

It is not an unprimeable number, because it can be changed into a prime (21735563551411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838563160 + ... + 1838574981.

It is an arithmetic number, because the mean of its divisors is an integer number (2846104921908).

Almost surely, 2^{21735563551451} is an apocalyptic number.

21735563551451 is a deficient number, since it is larger than the sum of its proper divisors (1033275823813).

21735563551451 is a wasteful number, since it uses less digits than its factorization.

21735563551451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677138421.

The product of its digits is 9450000, while the sum is 53.

The spelling of 21735563551451 in words is "twenty-one trillion, seven hundred thirty-five billion, five hundred sixty-three million, five hundred fifty-one thousand, four hundred fifty-one".