21365633076454 has 4 divisors (see below), whose sum is σ = 32048449614684. Its totient is φ = 10682816538226.

The previous prime is 21365633076367. The next prime is 21365633076467. The reversal of 21365633076454 is 45467033656312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21365633076395 and 21365633076404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5341408269112 + ... + 5341408269115.

It is an arithmetic number, because the mean of its divisors is an integer number (8012112403671).

Almost surely, 2^{21365633076454} is an apocalyptic number.

21365633076454 is a deficient number, since it is larger than the sum of its proper divisors (10682816538230).

21365633076454 is a wasteful number, since it uses less digits than its factorization.

21365633076454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10682816538229.

The product of its (nonzero) digits is 32659200, while the sum is 55.

The spelling of 21365633076454 in words is "twenty-one trillion, three hundred sixty-five billion, six hundred thirty-three million, seventy-six thousand, four hundred fifty-four".