20151105400 has 48 divisors (see below), whose sum is σ = 47306235600. Its totient is φ = 7982177280.

The previous prime is 20151105371. The next prime is 20151105419. The reversal of 20151105400 is 450115102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468505 + ... + 509704.

It is an arithmetic number, because the mean of its divisors is an integer number (985546575).

Almost surely, 2^20151105400 is an apocalyptic number.

20151105400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20151105400 is an abundant number, since it is smaller than the sum of its proper divisors (27155130200).

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

20151105400 is a wasteful number, since it uses less digits than its factorization.

20151105400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978328 (or 978319 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The spelling of 20151105400 in words is "twenty billion, one hundred fifty-one million, one hundred five thousand, four hundred".