20154551434 has 8 divisors (see below), whose sum is σ = 30237113988. Its totient is φ = 10075513440.

The previous prime is 20154551407. The next prime is 20154551449. The reversal of 20154551434 is 43415545102.

It can be written as a sum of positive squares in 2 ways, for example, as 18984706225 + 1169845209 = 137785^2 + 34203^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20154551434.

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, 866797 + ... + 889744.

Almost surely, 2^20154551434 is an apocalyptic number.

20154551434 is a deficient number, since it is larger than the sum of its proper divisors (10082562554).

20154551434 is a wasteful number, since it uses less digits than its factorization.

20154551434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762280.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20154551434 in words is "twenty billion, one hundred fifty-four million, five hundred fifty-one thousand, four hundred thirty-four".