20766442 has 8 divisors (see below), whose sum is σ = 31223232. Its totient is φ = 10358700.

The previous prime is 20766437. The next prime is 20766443. The reversal of 20766442 is 24466702.

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

It is a super-2 number, since 2×20766442² = 862490226678728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20766443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11184 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (3902904).

Almost surely, 2^20766442 is an apocalyptic number.

20766442 is a deficient number, since it is larger than the sum of its proper divisors (10456790).

20766442 is a wasteful number, since it uses less digits than its factorization.

20766442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24524.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 20766442 is about 4557.0211761632. The cubic root of 20766442 is about 274.8657945709.

The spelling of 20766442 in words is "twenty million, seven hundred sixty-six thousand, four hundred forty-two".