21602859454 has 16 divisors (see below), whose sum is σ = 36490461696. Its totient is φ = 9502723800.

The previous prime is 21602859449. The next prime is 21602859469. The reversal of 21602859454 is 45495820612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15837192 + ... + 15838555.

It is an arithmetic number, because the mean of its divisors is an integer number (2280653856).

Almost surely, 2^21602859454 is an apocalyptic number.

21602859454 is a deficient number, since it is larger than the sum of its proper divisors (14887602242).

21602859454 is a wasteful number, since it uses less digits than its factorization.

21602859454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31675791.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 21602859454 in words is "twenty-one billion, six hundred two million, eight hundred fifty-nine thousand, four hundred fifty-four".