20443425645 has 32 divisors (see below), whose sum is σ = 33070717440. Its totient is φ = 10783342080.

The previous prime is 20443425631. The next prime is 20443425659. The reversal of 20443425645 is 54652434402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20443425631) and next prime (20443425659).

It is not a de Polignac number, because 20443425645 - 2⁷ = 20443425517 is a prime.

It is a super-3 number, since 3×20443425645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538551 + ... + 575259.

It is an arithmetic number, because the mean of its divisors is an integer number (1033459920).

Almost surely, 2^20443425645 is an apocalyptic number.

It is an amenable number.

20443425645 is a deficient number, since it is larger than the sum of its proper divisors (12627291795).

20443425645 is a wasteful number, since it uses less digits than its factorization.

20443425645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37125.

The product of its (nonzero) digits is 460800, while the sum is 39.

The spelling of 20443425645 in words is "twenty billion, four hundred forty-three million, four hundred twenty-five thousand, six hundred forty-five".