20772494 has 4 divisors (see below), whose sum is σ = 31158744. Its totient is φ = 10386246.

The previous prime is 20772481. The next prime is 20772517. The reversal of 20772494 is 49427702.

It is a happy number.

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

It is a Curzon 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, 5193122 + ... + 5193125.

It is an arithmetic number, because the mean of its divisors is an integer number (7789686).

Almost surely, 2^20772494 is an apocalyptic number.

20772494 is a deficient number, since it is larger than the sum of its proper divisors (10386250).

20772494 is a wasteful number, since it uses less digits than its factorization.

20772494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386249.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20772494 is about 4557.6851580600. The cubic root of 20772494 is about 274.8924935149.

The spelling of 20772494 in words is "twenty million, seven hundred seventy-two thousand, four hundred ninety-four".