20762778 has 8 divisors (see below), whose sum is σ = 41525568. Its totient is φ = 6920924.

The previous prime is 20762771. The next prime is 20762827. The reversal of 20762778 is 87726702.

20762778 is nontrivially palindromic in base 12.

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

20762778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20762771) 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, 1730226 + ... + 1730237.

It is an arithmetic number, because the mean of its divisors is an integer number (5190696).

Almost surely, 2^20762778 is an apocalyptic number.

20762778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20762778 is a wasteful number, since it uses less digits than its factorization.

20762778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460468.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 20762778 is about 4556.6191414249. The cubic root of 20762778 is about 274.8496279833.

The spelling of 20762778 in words is "twenty million, seven hundred sixty-two thousand, seven hundred seventy-eight".