20014517447642 has 4 divisors (see below), whose sum is σ = 30021776171466. Its totient is φ = 10007258723820.

The previous prime is 20014517447629. The next prime is 20014517447663. The reversal of 20014517447642 is 24674471541002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10346714990161 + 9667802457481 = 3216631^2 + 3109309^2 .

It is a super-2 number, since 2×20014517447642² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003629361909 + ... + 5003629361912.

Almost surely, 2^{20014517447642} is an apocalyptic number.

20014517447642 is a deficient number, since it is larger than the sum of its proper divisors (10007258723824).

20014517447642 is a wasteful number, since it uses less digits than its factorization.

20014517447642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007258723823.

The product of its (nonzero) digits is 1505280, while the sum is 47.

Adding to 20014517447642 its reverse (24674471541002), we get a palindrome (44688988988644).

The spelling of 20014517447642 in words is "twenty trillion, fourteen billion, five hundred seventeen million, four hundred forty-seven thousand, six hundred forty-two".