20716542 has 48 divisors (see below), whose sum is σ = 55965312. Its totient is φ = 5380560.

The previous prime is 20716541. The next prime is 20716543. The reversal of 20716542 is 24561702.

20716542 is a `hidden beast` number, since 2 + 0 + 7 + 1 + 654 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20716541) and next prime (20716543).

It is a super-2 number, since 2×20716542² = 858350224875528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6088 + ... + 8859.

It is an arithmetic number, because the mean of its divisors is an integer number (1165944).

Almost surely, 2^20716542 is an apocalyptic number.

20716542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20716542 is an abundant number, since it is smaller than the sum of its proper divisors (35248770).

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

20716542 is a wasteful number, since it uses less digits than its factorization.

20716542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14973 (or 14970 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20716542 is about 4551.5428153539. The cubic root of 20716542 is about 274.6454582576.

The spelling of 20716542 in words is "twenty million, seven hundred sixteen thousand, five hundred forty-two".