20019057 has 8 divisors (see below), whose sum is σ = 26726784. Its totient is φ = 13328688.

The previous prime is 20019053. The next prime is 20019059. The reversal of 20019057 is 75091002.

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

It is not a de Polignac number, because 20019057 - 2² = 20019053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20019053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (3340848).

Almost surely, 2^20019057 is an apocalyptic number.

It is an amenable number.

20019057 is a deficient number, since it is larger than the sum of its proper divisors (6707727).

20019057 is an equidigital number, since it uses as much as digits as its factorization.

20019057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 20019057 is about 4474.2660850691. The cubic root of 20019057 is about 271.5279487184.

The spelling of 20019057 in words is "twenty million, nineteen thousand, fifty-seven".