20357420354 has 4 divisors (see below), whose sum is σ = 30536130534. Its totient is φ = 10178710176.

The previous prime is 20357420339. The next prime is 20357420393. The reversal of 20357420354 is 45302475302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18164839729 + 2192580625 = 134777^2 + 46825^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5089355087 + ... + 5089355090.

Almost surely, 2^20357420354 is an apocalyptic number.

20357420354 is a deficient number, since it is larger than the sum of its proper divisors (10178710180).

20357420354 is a wasteful number, since it uses less digits than its factorization.

20357420354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178710179.

The product of its (nonzero) digits is 100800, while the sum is 35.

Adding to 20357420354 its reverse (45302475302), we get a palindrome (65659895656).

The spelling of 20357420354 in words is "twenty billion, three hundred fifty-seven million, four hundred twenty thousand, three hundred fifty-four".