21454204074 has 16 divisors (see below), whose sum is σ = 42910973760. Its totient is φ = 7150973760.

The previous prime is 21454204049. The next prime is 21454204087. The reversal of 21454204074 is 47040245412.

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, 11979 + ... + 207489.

It is an arithmetic number, because the mean of its divisors is an integer number (2681935860).

Almost surely, 2^21454204074 is an apocalyptic number.

21454204074 is an abundant number, since it is smaller than the sum of its proper divisors (21456769686).

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

21454204074 is a wasteful number, since it uses less digits than its factorization.

21454204074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213805.

The product of its (nonzero) digits is 35840, while the sum is 33.

Adding to 21454204074 its reverse (47040245412), we get a palindrome (68494449486).

The spelling of 21454204074 in words is "twenty-one billion, four hundred fifty-four million, two hundred four thousand, seventy-four".