72020237405 has 16 divisors (see below), whose sum is σ = 86926633920. Its totient is φ = 57281436672.

The previous prime is 72020237347. The next prime is 72020237431. The reversal of 72020237405 is 50473202027.

It is a cyclic number.

It is not a de Polignac number, because 72020237405 - 2¹⁶ = 72020171869 is a prime.

It is a super-2 number, since 2×72020237405² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071677 + ... + 7081853.

It is an arithmetic number, because the mean of its divisors is an integer number (5432914620).

Almost surely, 2^72020237405 is an apocalyptic number.

It is an amenable number.

72020237405 is a deficient number, since it is larger than the sum of its proper divisors (14906396515).

72020237405 is a wasteful number, since it uses less digits than its factorization.

72020237405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18268.

The product of its (nonzero) digits is 23520, while the sum is 32.

The spelling of 72020237405 in words is "seventy-two billion, twenty million, two hundred thirty-seven thousand, four hundred five".