21737245542 has 32 divisors (see below), whose sum is σ = 44440952832. Its totient is φ = 7084959744.

The previous prime is 21737245529. The next prime is 21737245571. The reversal of 21737245542 is 24554273712.

It is a junction number, because it is equal to n+sod(n) for n = 21737245494 and 21737245503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271078 + ... + 341990.

It is an arithmetic number, because the mean of its divisors is an integer number (1388779776).

Almost surely, 2^21737245542 is an apocalyptic number.

21737245542 is an abundant number, since it is smaller than the sum of its proper divisors (22703707290).

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

21737245542 is a wasteful number, since it uses less digits than its factorization.

21737245542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72052.

The product of its digits is 470400, while the sum is 42.

The spelling of 21737245542 in words is "twenty-one billion, seven hundred thirty-seven million, two hundred forty-five thousand, five hundred forty-two".