20743724402 has 8 divisors (see below), whose sum is σ = 31143150300. Its totient is φ = 10362674304.

The previous prime is 20743724401. The next prime is 20743724461. The reversal of 20743724402 is 20442734702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20546068921 + 197655481 = 143339^2 + 14059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20743724402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20743724401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4591127 + ... + 4595642.

Almost surely, 2^20743724402 is an apocalyptic number.

20743724402 is a deficient number, since it is larger than the sum of its proper divisors (10399425898).

20743724402 is a wasteful number, since it uses less digits than its factorization.

20743724402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9187900.

The product of its (nonzero) digits is 75264, while the sum is 35.

The spelling of 20743724402 in words is "twenty billion, seven hundred forty-three million, seven hundred twenty-four thousand, four hundred two".