20742463 has 16 divisors (see below), whose sum is σ = 24597504. Its totient is φ = 17123040.

The previous prime is 20742461. The next prime is 20742479. The reversal of 20742463 is 36424702.

It is not a de Polignac number, because 20742463 - 2¹ = 20742461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742461) 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 15 ways as a sum of consecutive naturals, for example, 21573 + ... + 22513.

It is an arithmetic number, because the mean of its divisors is an integer number (1537344).

Almost surely, 2^20742463 is an apocalyptic number.

20742463 is a deficient number, since it is larger than the sum of its proper divisors (3855041).

20742463 is an equidigital number, since it uses as much as digits as its factorization.

20742463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20742463 is about 4554.3894212068. The cubic root of 20742463 is about 274.7599580263.

The spelling of 20742463 in words is "twenty million, seven hundred forty-two thousand, four hundred sixty-three".