20351655430042 has 16 divisors (see below), whose sum is σ = 30808476527400. Its totient is φ = 10082168858880.

The previous prime is 20351655430031. The next prime is 20351655430049. The reversal of 20351655430042 is 24003455615302.

It can be written as a sum of positive squares in 4 ways, for example, as 14202202753561 + 6149452676481 = 3768581^2 + 2479809^2 .

It is a super-2 number, since 2×20351655430042² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20351655429977 and 20351655430004.

It is not an unprimeable number, because it can be changed into a prime (20351655430049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5966934 + ... + 8735422.

Almost surely, 2^{20351655430042} is an apocalyptic number.

20351655430042 is a deficient number, since it is larger than the sum of its proper divisors (10456821097358).

20351655430042 is a wasteful number, since it uses less digits than its factorization.

20351655430042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802321.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 20351655430042 in words is "twenty trillion, three hundred fifty-one billion, six hundred fifty-five million, four hundred thirty thousand, forty-two".