20400726907 has 8 divisors (see below), whose sum is σ = 22260948912. Its totient is φ = 18541440000.

The previous prime is 20400726901. The next prime is 20400726919. The reversal of 20400726907 is 70962700402.

It is a happy number.

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 20400726907 - 2³¹ = 18253243259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400726901) 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, 187758 + ... + 275779.

It is an arithmetic number, because the mean of its divisors is an integer number (2782618614).

Almost surely, 2^20400726907 is an apocalyptic number.

20400726907 is a deficient number, since it is larger than the sum of its proper divisors (1860222005).

20400726907 is a wasteful number, since it uses less digits than its factorization.

20400726907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467549.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 20400726907 in words is "twenty billion, four hundred million, seven hundred twenty-six thousand, nine hundred seven".