20002400461 has 4 divisors (see below), whose sum is σ = 21055158400. Its totient is φ = 18949642524.

The previous prime is 20002400459. The next prime is 20002400477. The reversal of 20002400461 is 16400420002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16400420002 = 2 ⋅8200210001.

It is a cyclic number.

It is not a de Polignac number, because 20002400461 - 2¹ = 20002400459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1052757919 = 20002400461 / (2 + 0 + 0 + 0 + 2 + 4 + 0 + 0 + 4 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002400441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526378941 + ... + 526378978.

It is an arithmetic number, because the mean of its divisors is an integer number (5263789600).

Almost surely, 2^20002400461 is an apocalyptic number.

It is an amenable number.

20002400461 is a deficient number, since it is larger than the sum of its proper divisors (1052757939).

20002400461 is a wasteful number, since it uses less digits than its factorization.

20002400461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052757938.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20002400461 its reverse (16400420002), we get a palindrome (36402820463).

The spelling of 20002400461 in words is "twenty billion, two million, four hundred thousand, four hundred sixty-one".