20626542 has 32 divisors (see below), whose sum is σ = 48535200. Its totient is φ = 6470784.

The previous prime is 20626537. The next prime is 20626547. The reversal of 20626542 is 24562602.

20626542 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 654 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20626537) and next prime (20626547).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10317 + ... + 12152.

It is an arithmetic number, because the mean of its divisors is an integer number (1516725).

Almost surely, 2^20626542 is an apocalyptic number.

20626542 is an abundant number, since it is smaller than the sum of its proper divisors (27908658).

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

20626542 is a wasteful number, since it uses less digits than its factorization.

20626542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22497 (or 22491 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20626542 is about 4541.6452965858. The cubic root of 20626542 is about 274.2471618527.

The spelling of 20626542 in words is "twenty million, six hundred twenty-six thousand, five hundred forty-two".