72402020427 has 16 divisors (see below), whose sum is σ = 106754663808. Its totient is φ = 43278914880.

The previous prime is 72402020399. The next prime is 72402020447.

72402020427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72402020427 - 2¹² = 72402016331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72402020394 and 72402020403.

It is not an unprimeable number, because it can be changed into a prime (72402020447) 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, 15024993 + ... + 15029810.

It is an arithmetic number, because the mean of its divisors is an integer number (6672166488).

Almost surely, 2^72402020427 is an apocalyptic number.

72402020427 is a deficient number, since it is larger than the sum of its proper divisors (34352643381).

72402020427 is a wasteful number, since it uses less digits than its factorization.

72402020427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30054890.

The product of its (nonzero) digits is 12544, while the sum is 30.

It can be divided in two parts, 724020 and 20427, that added together give a palindrome (744447).

The spelling of 72402020427 in words is "seventy-two billion, four hundred two million, twenty thousand, four hundred twenty-seven".