20774629 has 4 divisors (see below), whose sum is σ = 21996684. Its totient is φ = 19552576.

The previous prime is 20774627. The next prime is 20774639. The reversal of 20774629 is 92647702.

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 2 ways, for example, as 14025025 + 6749604 = 3745^2 + 2598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20774629 - 2¹ = 20774627 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611002 + ... + 611035.

It is an arithmetic number, because the mean of its divisors is an integer number (5499171).

Almost surely, 2^20774629 is an apocalyptic number.

It is an amenable number.

20774629 is a deficient number, since it is larger than the sum of its proper divisors (1222055).

20774629 is a wasteful number, since it uses less digits than its factorization.

20774629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222054.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20774629 is about 4557.9193718187. The cubic root of 20774629 is about 274.9019110226.

The spelling of 20774629 in words is "twenty million, seven hundred seventy-four thousand, six hundred twenty-nine".