20878074001 has 4 divisors (see below), whose sum is σ = 20878364452. Its totient is φ = 20877783552.

The previous prime is 20878073977. The next prime is 20878074043. The reversal of 20878074001 is 10047087802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4920321025 + 15957752976 = 70145^2 + 126324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20878074001 - 2¹³ = 20878065809 is a prime.

It is a super-3 number, since 3×20878074001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20878074601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50761 + ... + 210553.

It is an arithmetic number, because the mean of its divisors is an integer number (5219591113).

Almost surely, 2^20878074001 is an apocalyptic number.

It is an amenable number.

20878074001 is a deficient number, since it is larger than the sum of its proper divisors (290451).

20878074001 is a wasteful number, since it uses less digits than its factorization.

20878074001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290450.

The product of its (nonzero) digits is 25088, while the sum is 37.

The spelling of 20878074001 in words is "twenty billion, eight hundred seventy-eight million, seventy-four thousand, one".