20430719 has 16 divisors (see below), whose sum is σ = 23316480. Its totient is φ = 17781120.

The previous prime is 20430713. The next prime is 20430727. The reversal of 20430719 is 91703402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20430719 is a prime.

It is a super-2 number, since 2×20430719² = 834828557713922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13154 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (1457280).

Almost surely, 2^20430719 is an apocalyptic number.

20430719 is a deficient number, since it is larger than the sum of its proper divisors (2885761).

20430719 is a wasteful number, since it uses less digits than its factorization.

20430719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20430719 is about 4520.0352874729. The cubic root of 20430719 is about 273.3765238445.

The spelling of 20430719 in words is "twenty million, four hundred thirty thousand, seven hundred nineteen".