20345402206 has 16 divisors (see below), whose sum is σ = 31177218816. Its totient is φ = 9953132056.

The previous prime is 20345402153. The next prime is 20345402219. The reversal of 20345402206 is 60220454302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282285 + ... + 346951.

It is an arithmetic number, because the mean of its divisors is an integer number (1948576176).

Almost surely, 2^20345402206 is an apocalyptic number.

20345402206 is a deficient number, since it is larger than the sum of its proper divisors (10831816610).

20345402206 is a wasteful number, since it uses less digits than its factorization.

20345402206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68063.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20345402206 its reverse (60220454302), we get a palindrome (80565856508).

The spelling of 20345402206 in words is "twenty billion, three hundred forty-five million, four hundred two thousand, two hundred six".