20029619 has 4 divisors (see below), whose sum is σ = 20900496. Its totient is φ = 19158744.

The previous prime is 20029609. The next prime is 20029631. The reversal of 20029619 is 91692002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91692002 = 2 ⋅45846001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20029619 is a prime.

It is a super-2 number, since 2×20029619² = 802371274570322, 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 = 20029591 and 20029600.

It is not an unprimeable number, because it can be changed into a prime (20029609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435404 + ... + 435449.

It is an arithmetic number, because the mean of its divisors is an integer number (5225124).

Almost surely, 2^20029619 is an apocalyptic number.

20029619 is a deficient number, since it is larger than the sum of its proper divisors (870877).

20029619 is an equidigital number, since it uses as much as digits as its factorization.

20029619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870876.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20029619 is about 4475.4462347346. The cubic root of 20029619 is about 271.5756927918.

The spelling of 20029619 in words is "twenty million, twenty-nine thousand, six hundred nineteen".