21730401585351 has 12 divisors (see below), whose sum is σ = 31390461393928. Its totient is φ = 14485963521744.

The previous prime is 21730401585337. The next prime is 21730401585377. The reversal of 21730401585351 is 15358510403712.

21730401585351 is a `hidden beast` number, since 2 + 1 + 7 + 30 + 4 + 0 + 1 + 585 + 35 + 1 = 666.

It is not a de Polignac number, because 21730401585351 - 2¹⁹ = 21730401061063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21730401585297 and 21730401585306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21730401585391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80763940 + ... + 81032553.

Almost surely, 2^{21730401585351} is an apocalyptic number.

21730401585351 is a deficient number, since it is larger than the sum of its proper divisors (9660059808577).

21730401585351 is a wasteful number, since it uses less digits than its factorization.

21730401585351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161811422 (or 161811419 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 21730401585351 in words is "twenty-one trillion, seven hundred thirty billion, four hundred one million, five hundred eighty-five thousand, three hundred fifty-one".