21104954653 has 8 divisors (see below), whose sum is σ = 22981802400. Its totient is φ = 19304713008.

The previous prime is 21104954639. The next prime is 21104954681. The reversal of 21104954653 is 35645940112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21104954653 - 2⁵ = 21104954621 is a prime.

It is a super-2 number, since 2×21104954653² (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 (21104954053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19150951 + ... + 19152052.

It is an arithmetic number, because the mean of its divisors is an integer number (2872725300).

Almost surely, 2^21104954653 is an apocalyptic number.

It is an amenable number.

21104954653 is a deficient number, since it is larger than the sum of its proper divisors (1876847747).

21104954653 is a wasteful number, since it uses less digits than its factorization.

21104954653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38303051.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 21104954653 in words is "twenty-one billion, one hundred four million, nine hundred fifty-four thousand, six hundred fifty-three".