20357200634 has 16 divisors (see below), whose sum is σ = 30833187840. Its totient is φ = 10079630400.

The previous prime is 20357200631. The next prime is 20357200637. The reversal of 20357200634 is 43600275302.

It is an interprime number because it is at equal distance from previous prime (20357200631) and next prime (20357200637).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20357200634.

It is not an unprimeable number, because it can be changed into a prime (20357200631) 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, 220997 + ... + 299255.

It is an arithmetic number, because the mean of its divisors is an integer number (1927074240).

Almost surely, 2^20357200634 is an apocalyptic number.

20357200634 is a deficient number, since it is larger than the sum of its proper divisors (10475987206).

20357200634 is a wasteful number, since it uses less digits than its factorization.

20357200634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79525.

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 20357200634 its reverse (43600275302), we get a palindrome (63957475936).

The spelling of 20357200634 in words is "twenty billion, three hundred fifty-seven million, two hundred thousand, six hundred thirty-four".