20077645 has 8 divisors (see below), whose sum is σ = 27535104. Its totient is φ = 13767504.

The previous prime is 20077639. The next prime is 20077693. The reversal of 20077645 is 54677002.

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

It is a cyclic number.

It is not a de Polignac number, because 20077645 - 2³ = 20077637 is a prime.

It is a super-3 number, since 3×20077645³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 286789 + ... + 286858.

It is an arithmetic number, because the mean of its divisors is an integer number (3441888).

Almost surely, 2^20077645 is an apocalyptic number.

It is an amenable number.

20077645 is a deficient number, since it is larger than the sum of its proper divisors (7457459).

20077645 is an equidigital number, since it uses as much as digits as its factorization.

20077645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573659.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20077645 is about 4480.8085207918. The cubic root of 20077645 is about 271.7925763267.

The spelling of 20077645 in words is "twenty million, seventy-seven thousand, six hundred forty-five".