21554456321002 has 32 divisors (see below), whose sum is σ = 35290871913024. Its totient is φ = 9791941900800.

The previous prime is 21554456320997. The next prime is 21554456321071. The reversal of 21554456321002 is 20012365445512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300554833 + ... + 300626539.

It is an arithmetic number, because the mean of its divisors is an integer number (1102839747282).

Almost surely, 2^{21554456321002} is an apocalyptic number.

21554456321002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21554456321002 is a deficient number, since it is larger than the sum of its proper divisors (13736415592022).

21554456321002 is a wasteful number, since it uses less digits than its factorization.

21554456321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79254.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 21554456321002 in words is "twenty-one trillion, five hundred fifty-four billion, four hundred fifty-six million, three hundred twenty-one thousand, two".