20356744573 has 16 divisors (see below), whose sum is σ = 23186405376. Its totient is φ = 17691197040.

The previous prime is 20356744559. The next prime is 20356744579. The reversal of 20356744573 is 37544765302.

It is not a de Polignac number, because 20356744573 - 2¹³ = 20356736381 is a prime.

It is a super-2 number, since 2×20356744573² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356744579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428536 + ... + 473662.

It is an arithmetic number, because the mean of its divisors is an integer number (1449150336).

Almost surely, 2^20356744573 is an apocalyptic number.

20356744573 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20356744573 is a deficient number, since it is larger than the sum of its proper divisors (2829660803).

20356744573 is a wasteful number, since it uses less digits than its factorization.

20356744573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46944.

The product of its (nonzero) digits is 2116800, while the sum is 46.

The spelling of 20356744573 in words is "twenty billion, three hundred fifty-six million, seven hundred forty-four thousand, five hundred seventy-three".