21454244413051 has 16 divisors (see below), whose sum is σ = 22349703720960. Its totient is φ = 20571618533760.

The previous prime is 21454244413037. The next prime is 21454244413061. The reversal of 21454244413051 is 15031444245412.

It is a cyclic number.

It is not a de Polignac number, because 21454244413051 - 2⁹ = 21454244412539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21454244412995 and 21454244413013.

It is not an unprimeable number, because it can be changed into a prime (21454244413061) 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, 9576580 + ... + 11602558.

It is an arithmetic number, because the mean of its divisors is an integer number (1396856482560).

Almost surely, 2^{21454244413051} is an apocalyptic number.

21454244413051 is a deficient number, since it is larger than the sum of its proper divisors (895459307909).

21454244413051 is a wasteful number, since it uses less digits than its factorization.

21454244413051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029146.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 21454244413051 its reverse (15031444245412), we get a palindrome (36485688658463).

The spelling of 21454244413051 in words is "twenty-one trillion, four hundred fifty-four billion, two hundred forty-four million, four hundred thirteen thousand, fifty-one".