21134302153655 has 4 divisors (see below), whose sum is σ = 25361162584392. Its totient is φ = 16907441722920.

The previous prime is 21134302153631. The next prime is 21134302153663. The reversal of 21134302153655 is 55635120343112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21134302153655 - 2¹² = 21134302149559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2113430215361 + ... + 2113430215370.

It is an arithmetic number, because the mean of its divisors is an integer number (6340290646098).

Almost surely, 2^{21134302153655} is an apocalyptic number.

21134302153655 is a deficient number, since it is larger than the sum of its proper divisors (4226860430737).

21134302153655 is an equidigital number, since it uses as much as digits as its factorization.

21134302153655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226860430736.

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 21134302153655 its reverse (55635120343112), we get a palindrome (76769422496767).

The spelling of 21134302153655 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred two million, one hundred fifty-three thousand, six hundred fifty-five".