20674778 has 8 divisors (see below), whose sum is σ = 31313568. Its totient is φ = 10236924.

The previous prime is 20674777. The next prime is 20674781. The reversal of 20674778 is 87747602.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20674777) 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, 49976 + ... + 50387.

It is an arithmetic number, because the mean of its divisors is an integer number (3914196).

Almost surely, 2^20674778 is an apocalyptic number.

20674778 is a deficient number, since it is larger than the sum of its proper divisors (10638790).

20674778 is a wasteful number, since it uses less digits than its factorization.

20674778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100468.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 20674778 is about 4546.9526058669. The cubic root of 20674778 is about 274.4607747730.

The spelling of 20674778 in words is "twenty million, six hundred seventy-four thousand, seven hundred seventy-eight".