20883778 has 8 divisors (see below), whose sum is σ = 31445568. Its totient is φ = 10401924.

The previous prime is 20883763. The next prime is 20883781. The reversal of 20883778 is 87738802.

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

It is a super-2 number, since 2×20883778² = 872264367106568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19326 + ... + 20377.

It is an arithmetic number, because the mean of its divisors is an integer number (3930696).

Almost surely, 2^20883778 is an apocalyptic number.

20883778 is a deficient number, since it is larger than the sum of its proper divisors (10561790).

20883778 is a wasteful number, since it uses less digits than its factorization.

20883778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39968.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 20883778 is about 4569.8772412396. The cubic root of 20883778 is about 275.3825112255.

The spelling of 20883778 in words is "twenty million, eight hundred eighty-three thousand, seven hundred seventy-eight".