20029501 has 2 divisors, whose sum is σ = 20029502. Its totient is φ = 20029500.

The previous prime is 20029489. The next prime is 20029523. The reversal of 20029501 is 10592002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 7284601 = 3570^2 + 2699^2 .

It is a cyclic number.

It is not a de Polignac number, because 20029501 - 2¹⁵ = 19996733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20029531) 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 as a sum of consecutive naturals, namely, 10014750 + 10014751.

It is an arithmetic number, because the mean of its divisors is an integer number (10014751).

Almost surely, 2^20029501 is an apocalyptic number.

It is an amenable number.

20029501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029501 is an equidigital number, since it uses as much as digits as its factorization.

20029501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20029501 is about 4475.4330516722. The cubic root of 20029501 is about 271.5751594817.

The spelling of 20029501 in words is "twenty million, twenty-nine thousand, five hundred one".