20707474392 has 384 divisors, whose sum is σ = 65610155520. Its totient is φ = 6115824000.

The previous prime is 20707474357. The next prime is 20707474421. The reversal of 20707474392 is 29347470702.

20707474392 is a `hidden beast` number, since 20 + 70 + 7 + 474 + 3 + 92 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 137135517 + ... + 137135667.

It is an arithmetic number, because the mean of its divisors is an integer number (170859780).

Almost surely, 2^20707474392 is an apocalyptic number.

20707474392 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 20707474392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32805077760).

20707474392 is an abundant number, since it is smaller than the sum of its proper divisors (44902681128).

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

20707474392 is a wasteful number, since it uses less digits than its factorization.

20707474392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 20707474392 in words is "twenty billion, seven hundred seven million, four hundred seventy-four thousand, three hundred ninety-two".