20922743 has 8 divisors (see below), whose sum is σ = 22273200. Its totient is φ = 19597248.

The previous prime is 20922739. The next prime is 20922761. The reversal of 20922743 is 34722902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20922743 - 2² = 20922739 is a prime.

It is a super-2 number, since 2×20922743² = 875522349288098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20922703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496 + ... + 7877.

It is an arithmetic number, because the mean of its divisors is an integer number (2784150).

Almost surely, 2^20922743 is an apocalyptic number.

20922743 is a deficient number, since it is larger than the sum of its proper divisors (1350457).

20922743 is a wasteful number, since it uses less digits than its factorization.

20922743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12481.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20922743 is about 4574.1384981218. The cubic root of 20922743 is about 275.5536745871.

The spelling of 20922743 in words is "twenty million, nine hundred twenty-two thousand, seven hundred forty-three".