20278552045 has 8 divisors (see below), whose sum is σ = 24339676824. Its totient is φ = 16219232064.

The previous prime is 20278551967. The next prime is 20278552067. The reversal of 20278552045 is 54025587202.

It can be written as a sum of positive squares in 4 ways, for example, as 392475721 + 19886076324 = 19811^2 + 141018^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20278552045 - 2¹³ = 20278543853 is a prime.

It is a super-2 number, since 2×20278552045² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20278551989 and 20278552007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426354 + ... + 471523.

It is an arithmetic number, because the mean of its divisors is an integer number (3042459603).

Almost surely, 2^20278552045 is an apocalyptic number.

It is an amenable number.

20278552045 is a deficient number, since it is larger than the sum of its proper divisors (4061124779).

20278552045 is an equidigital number, since it uses as much as digits as its factorization.

20278552045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902399.

The product of its (nonzero) digits is 224000, while the sum is 40.

The spelling of 20278552045 in words is "twenty billion, two hundred seventy-eight million, five hundred fifty-two thousand, forty-five".