73402020436 has 24 divisors (see below), whose sum is σ = 137648306880. Its totient is φ = 34125954432.

The previous prime is 73402020401. The next prime is 73402020457. The reversal of 73402020436 is 63402020437.

It is a junction number, because it is equal to n+sod(n) for n = 73402020398 and 73402020407.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6497016 + ... + 6508303.

It is an arithmetic number, because the mean of its divisors is an integer number (5735346120).

Almost surely, 2^73402020436 is an apocalyptic number.

It is an amenable number.

73402020436 is a deficient number, since it is larger than the sum of its proper divisors (64246286444).

73402020436 is a wasteful number, since it uses less digits than its factorization.

73402020436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13005423 (or 13005421 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 31.

Subtracting from 73402020436 its reverse (63402020437), we obtain a palindrome (9999999999).

It can be divided in two parts, 7340 and 2020436, that added together give a square (2027776 = 1424²).

The spelling of 73402020436 in words is "seventy-three billion, four hundred two million, twenty thousand, four hundred thirty-six".