20400260667 has 8 divisors (see below), whose sum is σ = 27201639696. Its totient is φ = 13599527712.

The previous prime is 20400260633. The next prime is 20400260707. The reversal of 20400260667 is 76606200402.

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

It is not a de Polignac number, because 20400260667 - 2⁶ = 20400260603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401260667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82288 + ... + 218109.

It is an arithmetic number, because the mean of its divisors is an integer number (3400204962).

Almost surely, 2^20400260667 is an apocalyptic number.

20400260667 is a deficient number, since it is larger than the sum of its proper divisors (6801379029).

20400260667 is a wasteful number, since it uses less digits than its factorization.

20400260667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323037.

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 20400260667 in words is "twenty billion, four hundred million, two hundred sixty thousand, six hundred sixty-seven".