215729414020 has 96 divisors (see below), whose sum is σ = 477556611840. Its totient is φ = 81700270080.

The previous prime is 215729413883. The next prime is 215729414029. The reversal of 215729414020 is 20414927512.

It is not an unprimeable number, because it can be changed into a prime (215729414029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24641964 + ... + 24650716.

It is an arithmetic number, because the mean of its divisors is an integer number (4974548040).

Almost surely, 2^215729414020 is an apocalyptic number.

215729414020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215729414020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238778305920).

215729414020 is an abundant number, since it is smaller than the sum of its proper divisors (261827197820).

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

215729414020 is a wasteful number, since it uses less digits than its factorization.

215729414020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325 (or 9323 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 215729414020 in words is "two hundred fifteen billion, seven hundred twenty-nine million, four hundred fourteen thousand, twenty".