21154511036263 has 8 divisors (see below), whose sum is σ = 23087819275920. Its totient is φ = 19222897942080.

The previous prime is 21154511036257. The next prime is 21154511036273. The reversal of 21154511036263 is 36263011545112.

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 21154511036263 - 2⁵ = 21154511036231 is a prime.

It is a super-2 number, since 2×21154511036263² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21154511036273) 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, 423760270 + ... + 423810187.

It is an arithmetic number, because the mean of its divisors is an integer number (2885977409490).

Almost surely, 2^{21154511036263} is an apocalyptic number.

21154511036263 is a deficient number, since it is larger than the sum of its proper divisors (1933308239657).

21154511036263 is a wasteful number, since it uses less digits than its factorization.

21154511036263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847572737.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 21154511036263 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred eleven million, thirty-six thousand, two hundred sixty-three".