20029791 has 8 divisors (see below), whose sum is σ = 28277424. Its totient is φ = 12567680.

The previous prime is 20029783. The next prime is 20029831. The reversal of 20029791 is 19792002.

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

It is a cyclic number.

It is not a de Polignac number, because 20029791 - 2³ = 20029783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196320 + ... + 196421.

It is an arithmetic number, because the mean of its divisors is an integer number (3534678).

Almost surely, 2^20029791 is an apocalyptic number.

20029791 is a deficient number, since it is larger than the sum of its proper divisors (8247633).

20029791 is a wasteful number, since it uses less digits than its factorization.

20029791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392761.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 20029791 is about 4475.4654506543. The cubic root of 20029791 is about 271.5764701553.

The spelling of 20029791 in words is "twenty million, twenty-nine thousand, seven hundred ninety-one".