20402535144261 has 8 divisors (see below), whose sum is σ = 28803579027264. Its totient is φ = 12801590678720.

The previous prime is 20402535144247. The next prime is 20402535144293. The reversal of 20402535144261 is 16244153520402.

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 20402535144261 - 2⁶ = 20402535144197 is a prime.

It is a super-2 number, since 2×20402535144261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402535144961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200024854305 + ... + 200024854406.

It is an arithmetic number, because the mean of its divisors is an integer number (3600447378408).

Almost surely, 2^{20402535144261} is an apocalyptic number.

It is an amenable number.

20402535144261 is a deficient number, since it is larger than the sum of its proper divisors (8401043883003).

20402535144261 is a wasteful number, since it uses less digits than its factorization.

20402535144261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400049708731.

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 20402535144261 its reverse (16244153520402), we get a palindrome (36646688664663).

The spelling of 20402535144261 in words is "twenty trillion, four hundred two billion, five hundred thirty-five million, one hundred forty-four thousand, two hundred sixty-one".