20434501 has 2 divisors, whose sum is σ = 20434502. Its totient is φ = 20434500.

The previous prime is 20434499. The next prime is 20434507. The reversal of 20434501 is 10543402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16394401 + 4040100 = 4049^2 + 2010^2 .

It is a cyclic number.

It is not a de Polignac number, because 20434501 - 2¹ = 20434499 is a prime.

It is a super-2 number, since 2×20434501² = 835137662238002, which contains 22 as substring.

Together with 20434499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20434507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217250 + 10217251.

It is an arithmetic number, because the mean of its divisors is an integer number (10217251).

Almost surely, 2^20434501 is an apocalyptic number.

It is an amenable number.

20434501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434501 is an equidigital number, since it uses as much as digits as its factorization.

20434501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20434501 is about 4520.4536276794. The cubic root of 20434501 is about 273.3933913570.

Adding to 20434501 its reverse (10543402), we get a palindrome (30977903).

The spelling of 20434501 in words is "twenty million, four hundred thirty-four thousand, five hundred one".