20425138237394 has 32 divisors (see below), whose sum is σ = 33487206831360. Its totient is φ = 9266322661200.

The previous prime is 20425138237393. The next prime is 20425138237397. The reversal of 20425138237394 is 49373283152402.

It is a happy number.

It is a super-2 number, since 2×20425138237394² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20425138237393) 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, 23563817 + ... + 24415235.

It is an arithmetic number, because the mean of its divisors is an integer number (1046475213480).

Almost surely, 2^{20425138237394} is an apocalyptic number.

20425138237394 is a deficient number, since it is larger than the sum of its proper divisors (13062068593966).

20425138237394 is a wasteful number, since it uses less digits than its factorization.

20425138237394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853526.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 20425138237394 in words is "twenty trillion, four hundred twenty-five billion, one hundred thirty-eight million, two hundred thirty-seven thousand, three hundred ninety-four".