20348478 has 12 divisors (see below), whose sum is σ = 44088408. Its totient is φ = 6782820.

The previous prime is 20348453. The next prime is 20348501. The reversal of 20348478 is 87484302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565218 + ... + 565253.

It is an arithmetic number, because the mean of its divisors is an integer number (3674034).

Almost surely, 2^20348478 is an apocalyptic number.

20348478 is an abundant number, since it is smaller than the sum of its proper divisors (23739930).

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

20348478 is a wasteful number, since it uses less digits than its factorization.

20348478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130479 (or 1130476 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 20348478 is about 4510.9287292087. The cubic root of 20348478 is about 273.0092175771.

The spelling of 20348478 in words is "twenty million, three hundred forty-eight thousand, four hundred seventy-eight".