20651033554 has 16 divisors (see below), whose sum is σ = 31817875608. Its totient is φ = 10045147392.

The previous prime is 20651033549. The next prime is 20651033569. The reversal of 20651033554 is 45533015602.

It can be written as a sum of positive squares in 4 ways, for example, as 15789179025 + 4861854529 = 125655^2 + 69727^2 .

It is an unprimeable number.

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, 814314 + ... + 839290.

Almost surely, 2^20651033554 is an apocalyptic number.

20651033554 is a deficient number, since it is larger than the sum of its proper divisors (11166842054).

20651033554 is a wasteful number, since it uses less digits than its factorization.

20651033554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36189.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 20651033554 in words is "twenty billion, six hundred fifty-one million, thirty-three thousand, five hundred fifty-four".