20404121645162 has 4 divisors (see below), whose sum is σ = 30606182467746. Its totient is φ = 10202060822580.

The previous prime is 20404121645147. The next prime is 20404121645197. The reversal of 20404121645162 is 26154612140402.

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., 18184263018601 + 2219858626561 = 4264301^2 + 1489919^2 .

It is a super-2 number, since 2×20404121645162² (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, 5101030411289 + ... + 5101030411292.

Almost surely, 2^{20404121645162} is an apocalyptic number.

20404121645162 is a deficient number, since it is larger than the sum of its proper divisors (10202060822584).

20404121645162 is a wasteful number, since it uses less digits than its factorization.

20404121645162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202060822583.

The product of its (nonzero) digits is 92160, while the sum is 38.

Adding to 20404121645162 its reverse (26154612140402), we get a palindrome (46558733785564).

The spelling of 20404121645162 in words is "twenty trillion, four hundred four billion, one hundred twenty-one million, six hundred forty-five thousand, one hundred sixty-two".