20051252051619 has 16 divisors (see below), whose sum is σ = 27304124295168. Its totient is φ = 13082946665472.

The previous prime is 20051252051569. The next prime is 20051252051629. The reversal of 20051252051619 is 91615025215002.

It is not a de Polignac number, because 20051252051619 - 2¹² = 20051252047523 is a prime.

It is a super-2 number, since 2×20051252051619² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20051252051629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13419619 + ... + 14838755.

It is an arithmetic number, because the mean of its divisors is an integer number (1706507768448).

Almost surely, 2^{20051252051619} is an apocalyptic number.

20051252051619 is a deficient number, since it is larger than the sum of its proper divisors (7252872243549).

20051252051619 is a wasteful number, since it uses less digits than its factorization.

20051252051619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519394.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 20051252051619 in words is "twenty trillion, fifty-one billion, two hundred fifty-two million, fifty-one thousand, six hundred nineteen".