20381213352 has 16 divisors (see below), whose sum is σ = 50953033440. Its totient is φ = 6793737776.

The previous prime is 20381213329. The next prime is 20381213371. The reversal of 20381213352 is 25331218302.

It is a happy 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, 424608588 + ... + 424608635.

It is an arithmetic number, because the mean of its divisors is an integer number (3184564590).

Almost surely, 2^20381213352 is an apocalyptic number.

It is an amenable number.

20381213352 is an abundant number, since it is smaller than the sum of its proper divisors (30571820088).

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

20381213352 is a wasteful number, since it uses less digits than its factorization.

20381213352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849217232 (or 849217228 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 20381213352 in words is "twenty billion, three hundred eighty-one million, two hundred thirteen thousand, three hundred fifty-two".