20401212435 has 16 divisors (see below), whose sum is σ = 32721758880. Its totient is φ = 10854040320.

The previous prime is 20401212431. The next prime is 20401212449. The reversal of 20401212435 is 53421210402.

It is not a de Polignac number, because 20401212435 - 2² = 20401212431 is a prime.

It is a super-3 number, since 3×20401212435³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20401212431) 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 15 ways as a sum of consecutive naturals, for example, 1656556 + ... + 1668825.

It is an arithmetic number, because the mean of its divisors is an integer number (2045109930).

Almost surely, 2^20401212435 is an apocalyptic number.

20401212435 is a deficient number, since it is larger than the sum of its proper divisors (12320546445).

20401212435 is a wasteful number, since it uses less digits than its factorization.

20401212435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325798.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20401212435 its reverse (53421210402), we get a palindrome (73822422837).

The spelling of 20401212435 in words is "twenty billion, four hundred one million, two hundred twelve thousand, four hundred thirty-five".