20770992 has 200 divisors, whose sum is σ = 69138432. Its totient is φ = 5961600.

The previous prime is 20770973. The next prime is 20771029. The reversal of 20770992 is 29907702.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 441913 + ... + 441959.

Almost surely, 2^20770992 is an apocalyptic number.

20770992 is a gapful number since it is divisible by the number (22) 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 20770992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34569216).

20770992 is an abundant number, since it is smaller than the sum of its proper divisors (48367440).

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

20770992 is a wasteful number, since it uses less digits than its factorization.

20770992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 20770992 is about 4557.5203784514. The cubic root of 20770992 is about 274.8858677902.

The spelling of 20770992 in words is "twenty million, seven hundred seventy thousand, nine hundred ninety-two".