21354743037357 has 16 divisors (see below), whose sum is σ = 31656692296000. Its totient is φ = 14227479183312.

The previous prime is 21354743037319. The next prime is 21354743037373. The reversal of 21354743037357 is 75373034745312.

21354743037357 is a `hidden beast` number, since 2 + 1 + 3 + 547 + 4 + 30 + 37 + 35 + 7 = 666.

It is not a de Polignac number, because 21354743037357 - 2²³ = 21354734648749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354743037307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250405882 + ... + 250491147.

It is an arithmetic number, because the mean of its divisors is an integer number (1978543268500).

Almost surely, 2^{21354743037357} is an apocalyptic number.

21354743037357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21354743037357 is a deficient number, since it is larger than the sum of its proper divisors (10301949258643).

21354743037357 is a wasteful number, since it uses less digits than its factorization.

21354743037357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500898617 (or 500898611 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 54.

The spelling of 21354743037357 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-three million, thirty-seven thousand, three hundred fifty-seven".