20573019 has 6 divisors (see below), whose sum is σ = 29716596. Its totient is φ = 13715340.

The previous prime is 20573011. The next prime is 20573039. The reversal of 20573019 is 91037502.

It is not a de Polignac number, because 20573019 - 2³ = 20573011 is a prime.

It is a super-2 number, since 2×20573019² = 846498221548722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20572983 and 20573001.

It is not an unprimeable number, because it can be changed into a prime (20573011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1142937 + ... + 1142954.

It is an arithmetic number, because the mean of its divisors is an integer number (4952766).

Almost surely, 2^20573019 is an apocalyptic number.

20573019 is a deficient number, since it is larger than the sum of its proper divisors (9143577).

20573019 is a wasteful number, since it uses less digits than its factorization.

20573019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285897 (or 2285894 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20573019 is about 4535.7490009920. The cubic root of 20573019 is about 274.0097453333.

The spelling of 20573019 in words is "twenty million, five hundred seventy-three thousand, nineteen".