20326156340 has 24 divisors (see below), whose sum is σ = 48782775552. Its totient is φ = 6968967840.

The previous prime is 20326156303. The next prime is 20326156381. The reversal of 20326156340 is 4365162302.

It is a junction number, because it is equal to n+sod(n) for n = 20326156297 and 20326156306.

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, 72593276 + ... + 72593555.

It is an arithmetic number, because the mean of its divisors is an integer number (2032615648).

Almost surely, 2^20326156340 is an apocalyptic number.

20326156340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20326156340 is an abundant number, since it is smaller than the sum of its proper divisors (28456619212).

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

20326156340 is a wasteful number, since it uses less digits than its factorization.

20326156340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145186847 (or 145186845 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20326156340 in words is "twenty billion, three hundred twenty-six million, one hundred fifty-six thousand, three hundred forty".