21577075146434 has 4 divisors (see below), whose sum is σ = 32365612719654. Its totient is φ = 10788537573216.

The previous prime is 21577075146397. The next prime is 21577075146461. The reversal of 21577075146434 is 43464157077512.

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

It can be written as a sum of positive squares in only one way, i.e., 11103456874225 + 10473618272209 = 3332185^2 + 3236297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21577075146434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5394268786607 + ... + 5394268786610.

Almost surely, 2^{21577075146434} is an apocalyptic number.

21577075146434 is a deficient number, since it is larger than the sum of its proper divisors (10788537573220).

21577075146434 is a wasteful number, since it uses less digits than its factorization.

21577075146434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10788537573219.

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 21577075146434 in words is "twenty-one trillion, five hundred seventy-seven billion, seventy-five million, one hundred forty-six thousand, four hundred thirty-four".