20077939 has 8 divisors (see below), whose sum is σ = 23566688. Its totient is φ = 16744320.

The previous prime is 20077931. The next prime is 20077943. The reversal of 20077939 is 93977002.

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 20077939 - 2³ = 20077931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20077898 and 20077907.

It is not an unprimeable number, because it can be changed into a prime (20077931) 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, 38502 + ... + 39019.

It is an arithmetic number, because the mean of its divisors is an integer number (2945836).

Almost surely, 2^20077939 is an apocalyptic number.

20077939 is a deficient number, since it is larger than the sum of its proper divisors (3488749).

20077939 is an equidigital number, since it uses as much as digits as its factorization.

20077939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77565.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20077939 is about 4480.8413272509. The cubic root of 20077939 is about 271.7939029535.

The spelling of 20077939 in words is "twenty million, seventy-seven thousand, nine hundred thirty-nine".