20723476 has 12 divisors (see below), whose sum is σ = 38399508. Its totient is φ = 9752192.

The previous prime is 20723473. The next prime is 20723489. The reversal of 20723476 is 67432702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 1887876 = 4340^2 + 1374^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152311 + ... + 152446.

It is an arithmetic number, because the mean of its divisors is an integer number (3199959).

Almost surely, 2^20723476 is an apocalyptic number.

It is an amenable number.

20723476 is a deficient number, since it is larger than the sum of its proper divisors (17676032).

20723476 is a wasteful number, since it uses less digits than its factorization.

20723476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304778 (or 304776 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20723476 is about 4552.3044713639. The cubic root of 20723476 is about 274.6760968840.

The spelling of 20723476 in words is "twenty million, seven hundred twenty-three thousand, four hundred seventy-six".