20019240377 has 4 divisors (see below), whose sum is σ = 20026177536. Its totient is φ = 20012303220.

The previous prime is 20019240359. The next prime is 20019240379. The reversal of 20019240377 is 77304291002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20019240377 - 2¹⁶ = 20019174841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20019240379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3464249 + ... + 3470022.

It is an arithmetic number, because the mean of its divisors is an integer number (5006544384).

Almost surely, 2^20019240377 is an apocalyptic number.

It is an amenable number.

20019240377 is a deficient number, since it is larger than the sum of its proper divisors (6937159).

20019240377 is an equidigital number, since it uses as much as digits as its factorization.

20019240377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937158.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 20019240377 in words is "twenty billion, nineteen million, two hundred forty thousand, three hundred seventy-seven".