21024890063 has 16 divisors (see below), whose sum is σ = 22378356000. Its totient is φ = 19684549632.

The previous prime is 21024890057. The next prime is 21024890083. The reversal of 21024890063 is 36009842012.

It is a cyclic number.

It is not a de Polignac number, because 21024890063 - 2⁶ = 21024889999 is a prime.

It is a super-2 number, since 2×21024890063² (a number of 21 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 (21024890023) 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, 7702883 + ... + 7705611.

It is an arithmetic number, because the mean of its divisors is an integer number (1398647250).

Almost surely, 2^21024890063 is an apocalyptic number.

21024890063 is a deficient number, since it is larger than the sum of its proper divisors (1353465937).

21024890063 is a wasteful number, since it uses less digits than its factorization.

21024890063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21024890063 in words is "twenty-one billion, twenty-four million, eight hundred ninety thousand, sixty-three".