20815348 has 6 divisors (see below), whose sum is σ = 36426866. Its totient is φ = 10407672.

The previous prime is 20815343. The next prime is 20815441. The reversal of 20815348 is 84351802.

It can be written as a sum of positive squares in only one way, i.e., 20684304 + 131044 = 4548^2 + 362^2 .

It is a super-2 number, since 2×20815348² = 866557424722208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20815343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601915 + ... + 2601922.

Almost surely, 2^20815348 is an apocalyptic number.

It is an amenable number.

20815348 is a deficient number, since it is larger than the sum of its proper divisors (15611518).

20815348 is a wasteful number, since it uses less digits than its factorization.

20815348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203841 (or 5203839 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 20815348 is about 4562.3840259233. The cubic root of 20815348 is about 275.0813995949.

The spelling of 20815348 in words is "twenty million, eight hundred fifteen thousand, three hundred forty-eight".