20692540 has 24 divisors (see below), whose sum is σ = 47405232. Its totient is φ = 7524480.

The previous prime is 20692523. The next prime is 20692541. The reversal of 20692540 is 4529602.

It is a junction number, because it is equal to n+sod(n) for n = 20692499 and 20692508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20692541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46809 + ... + 47248.

It is an arithmetic number, because the mean of its divisors is an integer number (1975218).

Almost surely, 2^20692540 is an apocalyptic number.

20692540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20692540 is an abundant number, since it is smaller than the sum of its proper divisors (26712692).

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

20692540 is a wasteful number, since it uses less digits than its factorization.

20692540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94077 (or 94075 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20692540 is about 4548.9053628318. The cubic root of 20692540 is about 274.5393500124.

The spelling of 20692540 in words is "twenty million, six hundred ninety-two thousand, five hundred forty".