20846992140 has 384 divisors, whose sum is σ = 72673413120. Its totient is φ = 4927620096.

The previous prime is 20846992121. The next prime is 20846992193. The reversal of 20846992140 is 4129964802.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21557937 + ... + 21558903.

It is an arithmetic number, because the mean of its divisors is an integer number (189253680).

Almost surely, 2^20846992140 is an apocalyptic number.

20846992140 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 20846992140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36336706560).

20846992140 is an abundant number, since it is smaller than the sum of its proper divisors (51826420980).

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

20846992140 is a wasteful number, since it uses less digits than its factorization.

20846992140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 20846992140 in words is "twenty billion, eight hundred forty-six million, nine hundred ninety-two thousand, one hundred forty".