21554105034 has 32 divisors (see below), whose sum is σ = 53745302016. Its totient is φ = 5598468720.

The previous prime is 21554105033. The next prime is 21554105057. The reversal of 21554105034 is 43050145512.

It is a junction number, because it is equal to n+sod(n) for n = 21554104992 and 21554105010.

It is not an unprimeable number, because it can be changed into a prime (21554105033) 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, 23326492 + ... + 23327415.

It is an arithmetic number, because the mean of its divisors is an integer number (1679540688).

Almost surely, 2^21554105034 is an apocalyptic number.

21554105034 is an abundant number, since it is smaller than the sum of its proper divisors (32191196982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21554105034 is a wasteful number, since it uses less digits than its factorization.

21554105034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46653930.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21554105034 in words is "twenty-one billion, five hundred fifty-four million, one hundred five thousand, thirty-four".