20364457774 has 4 divisors (see below), whose sum is σ = 30546686664. Its totient is φ = 10182228886.

The previous prime is 20364457753. The next prime is 20364457793. The reversal of 20364457774 is 47775446302.

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

It is a super-2 number, since 2×20364457774² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 5091114442 + ... + 5091114445.

It is an arithmetic number, because the mean of its divisors is an integer number (7636671666).

Almost surely, 2^20364457774 is an apocalyptic number.

20364457774 is a deficient number, since it is larger than the sum of its proper divisors (10182228890).

20364457774 is a wasteful number, since it uses less digits than its factorization.

20364457774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10182228889.

The product of its (nonzero) digits is 3951360, while the sum is 49.

The spelling of 20364457774 in words is "twenty billion, three hundred sixty-four million, four hundred fifty-seven thousand, seven hundred seventy-four".