21364766574154 has 4 divisors (see below), whose sum is σ = 32047149861234. Its totient is φ = 10682383287076.

The previous prime is 21364766574131. The next prime is 21364766574169. The reversal of 21364766574154 is 45147566746312.

It is a happy number.

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., 19034329237225 + 2330437336929 = 4362835^2 + 1526577^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21364766574092 and 21364766574101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5341191643537 + ... + 5341191643540.

Almost surely, 2^{21364766574154} is an apocalyptic number.

21364766574154 is a deficient number, since it is larger than the sum of its proper divisors (10682383287080).

21364766574154 is a wasteful number, since it uses less digits than its factorization.

21364766574154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682383287079.

The product of its digits is 101606400, while the sum is 61.

The spelling of 21364766574154 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-six million, five hundred seventy-four thousand, one hundred fifty-four".