20470738 has 16 divisors (see below), whose sum is σ = 31141656. Its totient is φ = 10091520.

The previous prime is 20470729. The next prime is 20470739. The reversal of 20470738 is 83707402.

It can be written as a sum of positive squares in 4 ways, for example, as 14085009 + 6385729 = 3753^2 + 2527^2 .

It is a super-2 number, since 2×20470738² = 838102228529288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20470739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69720 + ... + 70012.

Almost surely, 2^20470738 is an apocalyptic number.

20470738 is a deficient number, since it is larger than the sum of its proper divisors (10670918).

20470738 is a wasteful number, since it uses less digits than its factorization.

20470738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20470738 is about 4524.4599677752. The cubic root of 20470738 is about 273.5549009856.

The spelling of 20470738 in words is "twenty million, four hundred seventy thousand, seven hundred thirty-eight".