20035857660 has 192 divisors, whose sum is σ = 69277350912. Its totient is φ = 4213223424.

The previous prime is 20035857587. The next prime is 20035857689. The reversal of 20035857660 is 6675853002.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1670244 + ... + 1682196.

It is an arithmetic number, because the mean of its divisors is an integer number (360819536).

Almost surely, 2^20035857660 is an apocalyptic number.

20035857660 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 20035857660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34638675456).

20035857660 is an abundant number, since it is smaller than the sum of its proper divisors (49241493252).

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

20035857660 is a wasteful number, since it uses less digits than its factorization.

20035857660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12292 (or 12290 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20035857660 in words is "twenty billion, thirty-five million, eight hundred fifty-seven thousand, six hundred sixty".