20150408838 has 16 divisors (see below), whose sum is σ = 46058077440. Its totient is φ = 5757259656.

The previous prime is 20150408833. The next prime is 20150408843. The reversal of 20150408838 is 83880405102.

It is an interprime number because it is at equal distance from previous prime (20150408833) and next prime (20150408843).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20150408796 and 20150408805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150408833) 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, 239885778 + ... + 239885861.

It is an arithmetic number, because the mean of its divisors is an integer number (2878629840).

Almost surely, 2^20150408838 is an apocalyptic number.

20150408838 is an abundant number, since it is smaller than the sum of its proper divisors (25907668602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20150408838 is a wasteful number, since it uses less digits than its factorization.

20150408838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479771651.

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 20150408838 in words is "twenty billion, one hundred fifty million, four hundred eight thousand, eight hundred thirty-eight".