20253543445 has 8 divisors (see below), whose sum is σ = 24322998744. Its totient is φ = 16190337024.

The previous prime is 20253543439. The next prime is 20253543451. The reversal of 20253543445 is 54434535202.

It is an interprime number because it is at equal distance from previous prime (20253543439) and next prime (20253543451).

It can be written as a sum of positive squares in 4 ways, for example, as 13715688996 + 6537854449 = 117114^2 + 80857^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20253543445 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1555084 + ... + 1568053.

It is an arithmetic number, because the mean of its divisors is an integer number (3040374843).

Almost surely, 2^20253543445 is an apocalyptic number.

It is an amenable number.

20253543445 is a deficient number, since it is larger than the sum of its proper divisors (4069455299).

20253543445 is a wasteful number, since it uses less digits than its factorization.

20253543445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124439.

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 20253543445 in words is "twenty billion, two hundred fifty-three million, five hundred forty-three thousand, four hundred forty-five".