21436533354 has 16 divisors (see below), whose sum is σ = 42880826592. Its totient is φ = 7144217808.

The previous prime is 21436533257. The next prime is 21436533359. The reversal of 21436533354 is 45333563412.

It is not an unprimeable number, because it can be changed into a prime (21436533359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287104 + ... + 353979.

It is an arithmetic number, because the mean of its divisors is an integer number (2680051662).

Almost surely, 2^21436533354 is an apocalyptic number.

21436533354 is an abundant number, since it is smaller than the sum of its proper divisors (21444293238).

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

21436533354 is a wasteful number, since it uses less digits than its factorization.

21436533354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646661.

The product of its digits is 388800, while the sum is 39.

The spelling of 21436533354 in words is "twenty-one billion, four hundred thirty-six million, five hundred thirty-three thousand, three hundred fifty-four".