21470542554535 has 32 divisors (see below), whose sum is σ = 26197747548480. Its totient is φ = 16889165733888.

The previous prime is 21470542554509. The next prime is 21470542554583. The reversal of 21470542554535 is 53545524507412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21470542554535 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865421211 + ... + 865446019.

It is an arithmetic number, because the mean of its divisors is an integer number (818679610890).

Almost surely, 2^{21470542554535} is an apocalyptic number.

21470542554535 is a deficient number, since it is larger than the sum of its proper divisors (4727204993945).

21470542554535 is a wasteful number, since it uses less digits than its factorization.

21470542554535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32067.

The product of its (nonzero) digits is 16800000, while the sum is 52.

The spelling of 21470542554535 in words is "twenty-one trillion, four hundred seventy billion, five hundred forty-two million, five hundred fifty-four thousand, five hundred thirty-five".