20700778 has 8 divisors (see below), whose sum is σ = 35487072. Its totient is φ = 8871756.

The previous prime is 20700773. The next prime is 20700787. The reversal of 20700778 is 87700702.

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

It is not an unprimeable number, because it can be changed into a prime (20700773) 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, 739300 + ... + 739327.

It is an arithmetic number, because the mean of its divisors is an integer number (4435884).

Almost surely, 2^20700778 is an apocalyptic number.

20700778 is a deficient number, since it is larger than the sum of its proper divisors (14786294).

20700778 is a wasteful number, since it uses less digits than its factorization.

20700778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478636.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 20700778 is about 4549.8107652956. The cubic root of 20700778 is about 274.5757778764.

The spelling of 20700778 in words is "twenty million, seven hundred thousand, seven hundred seventy-eight".