20620551405142 has 16 divisors (see below), whose sum is σ = 35063285790960. Its totient is φ = 9016273488672.

The previous prime is 20620551405127. The next prime is 20620551405149. The reversal of 20620551405142 is 24150415502602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620551405149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20871002953 + ... + 20871003940.

It is an arithmetic number, because the mean of its divisors is an integer number (2191455361935).

Almost surely, 2^{20620551405142} is an apocalyptic number.

20620551405142 is a deficient number, since it is larger than the sum of its proper divisors (14442734385818).

20620551405142 is a wasteful number, since it uses less digits than its factorization.

20620551405142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41742006927.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 20620551405142 its reverse (24150415502602), we get a palindrome (44770966907744).

The spelling of 20620551405142 in words is "twenty trillion, six hundred twenty billion, five hundred fifty-one million, four hundred five thousand, one hundred forty-two".