21134564355 has 8 divisors (see below), whose sum is σ = 33815302992. Its totient is φ = 11271767648.

The previous prime is 21134564333. The next prime is 21134564377. The reversal of 21134564355 is 55346543112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21134564333) and next prime (21134564377).

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 21134564355 - 2⁹ = 21134563843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704485464 + ... + 704485493.

It is an arithmetic number, because the mean of its divisors is an integer number (4226912874).

Almost surely, 2^21134564355 is an apocalyptic number.

21134564355 is a deficient number, since it is larger than the sum of its proper divisors (12680738637).

21134564355 is a wasteful number, since it uses less digits than its factorization.

21134564355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408970965.

The product of its digits is 216000, while the sum is 39.

The spelling of 21134564355 in words is "twenty-one billion, one hundred thirty-four million, five hundred sixty-four thousand, three hundred fifty-five".