20235213677 has 16 divisors (see below), whose sum is σ = 24720014592. Its totient is φ = 16185713280.

The previous prime is 20235213653. The next prime is 20235213721. The reversal of 20235213677 is 77631253202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20235213677 - 2⁶ = 20235213613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20235213677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235213377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1526138 + ... + 1539339.

It is an arithmetic number, because the mean of its divisors is an integer number (1545000912).

Almost surely, 2^20235213677 is an apocalyptic number.

It is an amenable number.

20235213677 is a deficient number, since it is larger than the sum of its proper divisors (4484800915).

20235213677 is a wasteful number, since it uses less digits than its factorization.

20235213677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065548.

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 20235213677 its reverse (77631253202), we get a palindrome (97866466879).

The spelling of 20235213677 in words is "twenty billion, two hundred thirty-five million, two hundred thirteen thousand, six hundred seventy-seven".