20541562465 has 8 divisors (see below), whose sum is σ = 25223128128. Its totient is φ = 16051081200.

The previous prime is 20541562463. The next prime is 20541562477. The reversal of 20541562465 is 56426514502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20541562465 - 2¹ = 20541562463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541562463) 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, 47770861 + ... + 47771290.

It is an arithmetic number, because the mean of its divisors is an integer number (3152891016).

Almost surely, 2^20541562465 is an apocalyptic number.

It is an amenable number.

20541562465 is a deficient number, since it is larger than the sum of its proper divisors (4681565663).

20541562465 is an equidigital number, since it uses as much as digits as its factorization.

20541562465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95542199.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 20541562465 in words is "twenty billion, five hundred forty-one million, five hundred sixty-two thousand, four hundred sixty-five".