21424034144045 has 24 divisors (see below), whose sum is σ = 27928080865152. Its totient is φ = 15769954200000.

The previous prime is 21424034144021. The next prime is 21424034144057. The reversal of 21424034144045 is 54044143042412.

It is not a de Polignac number, because 21424034144045 - 2²⁸ = 21423765708589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40499081 + ... + 41024670.

It is an arithmetic number, because the mean of its divisors is an integer number (1163670036048).

Almost surely, 2^{21424034144045} is an apocalyptic number.

It is an amenable number.

21424034144045 is a deficient number, since it is larger than the sum of its proper divisors (6504046721107).

21424034144045 is a wasteful number, since it uses less digits than its factorization.

21424034144045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81524093 (or 81524080 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 38.

Adding to 21424034144045 its reverse (54044143042412), we get a palindrome (75468177186457).

The spelling of 21424034144045 in words is "twenty-one trillion, four hundred twenty-four billion, thirty-four million, one hundred forty-four thousand, forty-five".