21374400047454 has 128 divisors (see below), whose sum is σ = 49435033536000. Its totient is φ = 6841898198784.

The previous prime is 21374400047417. The next prime is 21374400047479. The reversal of 21374400047454 is 45474000447312.

21374400047454 is a `hidden beast` number, since 2 + 137 + 4 + 40 + 0 + 0 + 474 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23080884 + ... + 23989080.

It is an arithmetic number, because the mean of its divisors is an integer number (386211199500).

Almost surely, 2^{21374400047454} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21374400047454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24717516768000).

21374400047454 is an abundant number, since it is smaller than the sum of its proper divisors (28060633488546).

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

21374400047454 is a wasteful number, since it uses less digits than its factorization.

21374400047454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908439 (or 908433 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 45.

The spelling of 21374400047454 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred million, forty-seven thousand, four hundred fifty-four".