20202354961 has 4 divisors (see below), whose sum is σ = 20445756912. Its totient is φ = 19958953012.

The previous prime is 20202354943. The next prime is 20202354983. The reversal of 20202354961 is 16945320202.

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 20202354961 - 2¹⁹ = 20201830673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202354061) 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, 121700851 + ... + 121701016.

It is an arithmetic number, because the mean of its divisors is an integer number (5111439228).

Almost surely, 2^20202354961 is an apocalyptic number.

It is an amenable number.

20202354961 is a deficient number, since it is larger than the sum of its proper divisors (243401951).

20202354961 is an equidigital number, since it uses as much as digits as its factorization.

20202354961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243401950.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20202354961 in words is "twenty billion, two hundred two million, three hundred fifty-four thousand, nine hundred sixty-one".