20610019 has 4 divisors (see below), whose sum is σ = 20802744. Its totient is φ = 20417296.

The previous prime is 20610013. The next prime is 20610043. The reversal of 20610019 is 91001602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20610019 - 2⁹ = 20609507 is a prime.

It is a super-2 number, since 2×20610019² = 849545766360722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20609978 and 20610005.

It is not an unprimeable number, because it can be changed into a prime (20610013) 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, 96202 + ... + 96415.

It is an arithmetic number, because the mean of its divisors is an integer number (5200686).

Almost surely, 2^20610019 is an apocalyptic number.

20610019 is a deficient number, since it is larger than the sum of its proper divisors (192725).

20610019 is a wasteful number, since it uses less digits than its factorization.

20610019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192724.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 20610019 is about 4539.8258777182. The cubic root of 20610019 is about 274.1739132465.

The spelling of 20610019 in words is "twenty million, six hundred ten thousand, nineteen".