21030355510463 has 16 divisors (see below), whose sum is σ = 22702528116576. Its totient is φ = 19366012968960.

The previous prime is 21030355510457. The next prime is 21030355510523. The reversal of 21030355510463 is 36401555303012.

It is a cyclic number.

It is not a de Polignac number, because 21030355510463 - 2²⁰ = 21030354461887 is a prime.

It is a super-2 number, since 2×21030355510463² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030355510163) 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, 8828195 + ... + 10954347.

It is an arithmetic number, because the mean of its divisors is an integer number (1418908007286).

Almost surely, 2^{21030355510463} is an apocalyptic number.

21030355510463 is a deficient number, since it is larger than the sum of its proper divisors (1672172606113).

21030355510463 is a wasteful number, since it uses less digits than its factorization.

21030355510463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127994.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 21030355510463 in words is "twenty-one trillion, thirty billion, three hundred fifty-five million, five hundred ten thousand, four hundred sixty-three".