20001242435 has 16 divisors (see below), whose sum is σ = 24836781600. Its totient is φ = 15444473856.

The previous prime is 20001242413. The next prime is 20001242461. The reversal of 20001242435 is 53424210002.

It is a happy number.

It is not a de Polignac number, because 20001242435 - 2¹⁰ = 20001241411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001242435.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493667 + ... + 532643.

It is an arithmetic number, because the mean of its divisors is an integer number (1552298850).

Almost surely, 2^20001242435 is an apocalyptic number.

20001242435 is a deficient number, since it is larger than the sum of its proper divisors (4835539165).

20001242435 is a wasteful number, since it uses less digits than its factorization.

20001242435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42550.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20001242435 its reverse (53424210002), we get a palindrome (73425452437).

The spelling of 20001242435 in words is "twenty billion, one million, two hundred forty-two thousand, four hundred thirty-five".