20445442154 has 8 divisors (see below), whose sum is σ = 31100109408. Its totient is φ = 10078739020.

The previous prime is 20445442123. The next prime is 20445442181. The reversal of 20445442154 is 45124454402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20445442154² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71990852 + ... + 71991135.

It is an arithmetic number, because the mean of its divisors is an integer number (3887513676).

Almost surely, 2^20445442154 is an apocalyptic number.

20445442154 is a deficient number, since it is larger than the sum of its proper divisors (10654667254).

20445442154 is a wasteful number, since it uses less digits than its factorization.

20445442154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143982060.

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 20445442154 its reverse (45124454402), we get a palindrome (65569896556).

The spelling of 20445442154 in words is "twenty billion, four hundred forty-five million, four hundred forty-two thousand, one hundred fifty-four".