20078606601 has 27 divisors (see below), whose sum is σ = 29290784341. Its totient is φ = 13253957664.

The previous prime is 20078606567. The next prime is 20078606629. The reversal of 20078606601 is 10660687002.

It is a happy number.

The square root of 20078606601 is 141699.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13896873225 + 6181733376 = 117885^2 + 78624^2 .

It is not a de Polignac number, because 20078606601 - 2⁹ = 20078606089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20078602601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 63339295 + ... + 63339611.

Almost surely, 2^20078606601 is an apocalyptic number.

20078606601 is the 141699-th square number.

20078606601 is the 70850-th centered octagonal number.

It is an amenable number.

20078606601 is a deficient number, since it is larger than the sum of its proper divisors (9212177740).

20078606601 is an frugal number, since it uses more digits than its factorization.

20078606601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Multiplying 20078606601 by its sum of digits (36), we get a square (722829837636 = 850194²).

The spelling of 20078606601 in words is "twenty billion, seventy-eight million, six hundred six thousand, six hundred one".