20347392 has 80 divisors (see below), whose sum is σ = 58433760. Its totient is φ = 6254592.

The previous prime is 20347361. The next prime is 20347409. The reversal of 20347392 is 29374302.

It is a super-2 number, since 2×20347392² = 828032722403328, which contains 22 as substring.

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, 19459 + ... + 20477.

It is an arithmetic number, because the mean of its divisors is an integer number (730422).

Almost surely, 2^20347392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20347392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29216880).

20347392 is an abundant number, since it is smaller than the sum of its proper divisors (38086368).

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

20347392 is a wasteful number, since it uses less digits than its factorization.

20347392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20347392 is about 4510.8083532777. The cubic root of 20347392 is about 273.0043606490.

The spelling of 20347392 in words is "twenty million, three hundred forty-seven thousand, three hundred ninety-two".