21045544154104 has 32 divisors (see below), whose sum is σ = 39574663002720. Its totient is φ = 10492320617856.

The previous prime is 21045544154081. The next prime is 21045544154111. The reversal of 21045544154104 is 40145144554012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7213522 + ... + 9701854.

It is an arithmetic number, because the mean of its divisors is an integer number (1236708218835).

Almost surely, 2^{21045544154104} is an apocalyptic number.

It is an amenable number.

21045544154104 is a deficient number, since it is larger than the sum of its proper divisors (18529118848616).

21045544154104 is a wasteful number, since it uses less digits than its factorization.

21045544154104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491399 (or 2491395 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 40.

The spelling of 21045544154104 in words is "twenty-one trillion, forty-five billion, five hundred forty-four million, one hundred fifty-four thousand, one hundred four".