51637020 has 48 divisors (see below), whose sum is σ = 147667968. Its totient is φ = 13476160.

The previous prime is 51637013. The next prime is 51637021. The reversal of 51637020 is 2073615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51637021) 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, 6336 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (3076416).

Almost surely, 2^51637020 is an apocalyptic number.

It is an amenable number.

51637020 is an abundant number, since it is smaller than the sum of its proper divisors (96030948).

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

51637020 is a wasteful number, since it uses less digits than its factorization.

51637020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370 (or 18368 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 51637020 is about 7185.8903414956. The cubic root of 51637020 is about 372.3806082547.

The spelling of 51637020 in words is "fifty-one million, six hundred thirty-seven thousand, twenty".