18930637977770 has 16 divisors (see below), whose sum is σ = 34078722972840. Its totient is φ = 7571460832704.

The previous prime is 18930637977721. The next prime is 18930637977799. The reversal of 18930637977770 is 7777973603981.

It can be written as a sum of positive squares in 4 ways, for example, as 14589244850569 + 4341393127201 = 3819587^2 + 2083601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99194705 + ... + 99385364.

Almost surely, 2^{18930637977770} is an apocalyptic number.

18930637977770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18930637977770 is a deficient number, since it is larger than the sum of its proper divisors (15148084995070).

18930637977770 is a wasteful number, since it uses less digits than its factorization.

18930637977770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198589609.

The product of its (nonzero) digits is 588110544, while the sum is 74.

The spelling of 18930637977770 in words is "eighteen trillion, nine hundred thirty billion, six hundred thirty-seven million, nine hundred seventy-seven thousand, seven hundred seventy".