20909353926 has 8 divisors (see below), whose sum is σ = 41818707864. Its totient is φ = 6969784640.

The previous prime is 20909353891. The next prime is 20909353931. The reversal of 20909353926 is 62935390902.

It is a sphenic number, since it is the product of 3 distinct primes.

20909353926 is an admirable number.

It is a super-2 number, since 2×20909353926² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742446155 + ... + 1742446166.

It is an arithmetic number, because the mean of its divisors is an integer number (5227338483).

Almost surely, 2^20909353926 is an apocalyptic number.

20909353926 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20909353926 is a wasteful number, since it uses less digits than its factorization.

20909353926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484892326.

The product of its (nonzero) digits is 787320, while the sum is 48.

The spelling of 20909353926 in words is "twenty billion, nine hundred nine million, three hundred fifty-three thousand, nine hundred twenty-six".