21504496101 has 16 divisors (see below), whose sum is σ = 31417072128. Its totient is φ = 12975609200.

The previous prime is 21504496067. The next prime is 21504496133. The reversal of 21504496101 is 10169440512.

It is a cyclic number.

It is not a de Polignac number, because 21504496101 - 2⁹ = 21504495589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21504496801) 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, 1427865 + ... + 1442846.

It is an arithmetic number, because the mean of its divisors is an integer number (1963567008).

Almost surely, 2^21504496101 is an apocalyptic number.

It is an amenable number.

21504496101 is a deficient number, since it is larger than the sum of its proper divisors (9912576027).

21504496101 is a wasteful number, since it uses less digits than its factorization.

21504496101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870952.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 21504496101 in words is "twenty-one billion, five hundred four million, four hundred ninety-six thousand, one hundred one".