20402611650361 has 4 divisors (see below), whose sum is σ = 20402638576272. Its totient is φ = 20402584724452.

The previous prime is 20402611650353. The next prime is 20402611650367. The reversal of 20402611650361 is 16305611620402.

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.

It is a cyclic number.

It is not a de Polignac number, because 20402611650361 - 2³ = 20402611650353 is a prime.

It is a super-2 number, since 2×20402611650361² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402611650361.

It is not an unprimeable number, because it can be changed into a prime (20402611650367) 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, 12292435 + ... + 13853128.

It is an arithmetic number, because the mean of its divisors is an integer number (5100659644068).

Almost surely, 2^{20402611650361} is an apocalyptic number.

It is an amenable number.

20402611650361 is a deficient number, since it is larger than the sum of its proper divisors (26925911).

20402611650361 is an equidigital number, since it uses as much as digits as its factorization.

20402611650361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26925910.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 20402611650361 in words is "twenty trillion, four hundred two billion, six hundred eleven million, six hundred fifty thousand, three hundred sixty-one".